Containers and Equipment
Can You Use Mason Jars for Candles?
Two sellers in this category publish the same precaution. That is the answer, and almost nobody repeats it.
We have not burned these candles and we do not claim to have. Here is what we did instead. Links to Amazon earn us a commission at no extra cost to you — disclosure.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 |  8 oz Glass Jars with Lids, 20 PackTop pickPublishes 2.67 by 3.67 inches and tells you to preheat the glass with warm water before pouring wax. Two useful facts, which puts it ahead of most of this category, in the one jar size the wick charts are least ambiguous about. | A published size and a published warning, in the standard 8 oz | |
| 2 |  12 oz Glass Jars with Lids, 20 PackThe one listing in this category that prints dimensions, and the only one that publishes an opening measurement. Read that 2.24-inch opening carefully: it is the mouth, not the body, and the body is what the wick charts want. | The only mason-style jar here that publishes a diameter | |
| 3 |  SHOWIN Thick Glass Candle Jars with Wood Lids, 7 oz, 16 packSeven ounces in thick glass with a wooden lid, sixteen to a box. This is the size that lines up with the standard soy wick charts and the quantity that lets you actually test a wick. | The jar most beginner recipes assume | |
| 4 |  Thick Glass Jars with Metal Lids, 8 oz, 24 PackTwenty-four 8 oz jars with lids and labels, described as thick glass with high temperature resistance and no figure attached to either claim. Fine glass at a good count, bought on faith rather than on specification. | The most jars per order, if you will measure them yourself | |
| 5 |  CycleMore Glass Mason Jars with Separable Lids, 12 oz, 20 PackA 3 by 4.7 inch wide-mouth 12 oz jar, which is the widest glass here and therefore the one that needs the most wick. Buy it for the shape, and budget for a size up or two wicks. | A genuinely wide mouth, if you want a bigger candle | |
| 6 |  DARJEN 8 oz Glass Candle Jars with Wooden Lids, 10 packEight ounces is the size a shop-bought candle usually is, which makes it the size a gift candle should be. Ten in a pack is a sensible first order. | The classic 8 ounce gift candle |
This question gets answered two ways online and both are wrong. One says mason jars are perfectly fine because people have done it forever. The other says never use a jar not sold for candles, which would be more persuasive if jars sold for candles published anything the canning jars do not.
We read the listings instead. Four mason-style jars, and between them there is enough published material to answer this properly.
What the listings publish
| Jar | Capacity | Dimensions | Opening | Heat claim | Preheat precaution |
|---|---|---|---|---|---|
| 8 oz, 20 pack with chalk pen | 8 fl oz | 2.67 x 3.67 in | Not published | High-temperature resistant, no figure | Yes - preheat with warm water before pouring wax |
| Ritayedet 12 oz, 20 pack | 12 oz | 2.87 x 4.29 in | 2.24 in | Not published | Yes - soak in warm water first |
| Thick glass 8 oz, 24 pack | 8 oz (240 ml) | Not published | Not published | High temperature resistance, no figure | No |
| CycleMore 12 oz, 20 pack | 12 oz (350 ml) | 3 x 4.7 in | Described as wide mouth | Durable high quality glass | No |
Three of four publish a dimension, which is more than the candle-specific jars manage. The supplies hub has carried a standing finding that not one jar listing publishes an internal diameter, and this category is the closest thing to an exception we have found - with a catch worth being precise about.
The diameter trap
That gap tells you something about the shape. A jar whose mouth is six tenths of an inch narrower than its body is a shouldered jar: it curves inward at the top. In a candle, that shoulder is a ledge where unmelted wax sits forever, because the flame is centered on the mouth and the melt pool wants to spread to the widest point below it.
So the practical reading of these four is straight sides first. Of the ones that publish dimensions, the 8 oz at 2.67 by 3.67 inches is the closest to straight-sided, and it is also the easiest size to wick: what size candle jar explains why 7 to 8 fluid ounces is the size the published charts are least ambiguous about.
The figures above are all outside dimensions. Take a couple of millimeters off each side for the glass thickness and you have a usable estimate, and then measure the real thing when it arrives. How to choose a wick size starts from that measurement, and the full cross-manufacturer table is in the wick size chart.
Top pick · A published size and a published warning, in the standard 8 oz
8 oz Glass Jars with Lids, 20 Pack
Generic (Amazon listing)
Publishes 2.67 by 3.67 inches and tells you to preheat the glass with warm water before pouring wax. Two useful facts, which puts it ahead of most of this category, in the one jar size the wick charts are least ambiguous about.
$26.99 · 10% off
#ad · how this is funded · price as of October 23, 2026
Published specifications
- Capacity
- 8 fl ozSource: Amazon product listing, read 2026-10-23
- Dimensions
- 2.67 in W x 3.67 in HSource: Amazon product listing, read 2026-10-23
- Count
- 20 jars, 20 stickers, 1 chalkboard penSource: Amazon product listing, read 2026-10-23
- Glass
- Food-grade, stated strong, dishwasher safe, high-temperature resistantSource: Amazon product listing, read 2026-10-23
- Thermal precaution
- Please preheat the jars with warm water before pouring waxSource: Amazon product listing, read 2026-10-23
- Lids
- Corrosion-resistant metal lug lidsSource: Amazon product listing, read 2026-10-23
- Internal diameter
- Not published
- Temperature rating
- Not published
What that means
2.67 inches is an outside width. Take a millimeter or two off each side for the glass and you are near 2.5 inches of inside diameter, which is squarely in the range every published wick chart covers.
The preheat instruction is the second listing in this category to publish one, and the two of them agreeing is what turns a rumour about thermal shock into a seller-published precaution.
Eight fluid ounces is the size the site recommends elsewhere for exactly this reason: the wick guidance for it is the least contested of any container size.
Good
- Publishes outside dimensions, so the wick can be estimated before the box lands
- Publishes the preheat precaution for pouring wax
- Standard 8 oz, the best-documented size for wicking
- Lug lids rather than a foam-lined press cap
Less good
- Outside dimensions only, so the inside diameter is still an inference
- High-temperature resistant with no figure, like everything else here
- Sold across a long uses list rather than specified as a candle container
Skip this one if
You want a jar specified for candles with a published internal diameter. No jar in this category publishes one, and the candle-specific jars in our jar roundup at least do not have to be preheated.
Pick 2 · The only mason-style jar here that publishes a diameter
12 oz Glass Jars with Lids, 20 Pack
Ritayedet
The one listing in this category that prints dimensions, and the only one that publishes an opening measurement. Read that 2.24-inch opening carefully: it is the mouth, not the body, and the body is what the wick charts want.
$36.44 · 23% off
#ad · how this is funded · price as of October 23, 2026
Published specifications
- Capacity
- 12 ozSource: Amazon product listing, read 2026-10-23
- Outside diameter
- Approx 2.87 inSource: Amazon product listing, read 2026-10-23
- Height
- Approx 4.29 inSource: Amazon product listing, read 2026-10-23
- Opening
- 2.24 inSource: Amazon product listing, read 2026-10-23
- Internal body diameter
- Not published
- Count
- 20Source: Amazon product listing, read 2026-10-23
- Lids
- Corrosion-resistant leak-proof metalSource: Amazon product listing, read 2026-10-23
- Thermal precaution
- Soak the jars in warm water first if you need to pour boiling water inside, especially use as candle containersSource: Amazon product listing, read 2026-10-23
- Temperature rating
- Not published
What that means
An opening of 2.24 inches on a body 2.87 inches across the outside is a shouldered jar: it narrows at the top. That shape traps a ring of unmelted wax at the shoulder in a candle wicked to the mouth, so wick to the widest part of the inside and expect to measure it yourself.
The thermal precaution is the most useful sentence on any jar listing we have read. The seller is telling you the glass needs warming before hot liquid goes in, which is the actual answer to whether a canning jar takes a candle.
The uses list runs to fifteen items with candle jars among them. This is a canning jar with candle making added to the keywords, and it is honest enough about that to be useful.
Good
- Publishes outside diameter, height and opening - more dimensional data than any jar listing on the site
- Publishes a thermal precaution for pouring hot wax
- Leak-proof metal lids, so the candle can be lidded for curing
- Blank labels included
Less good
- The published 2.24 in is the opening, not the body, and the body is what sets the wick
- Shouldered shape leaves wax at the neck if wicked to the mouth
- No temperature rating, only a precaution
- Sold for fifteen purposes, specified for none of them
Skip this one if
You want a straight-sided jar you can wick off a chart without measuring. A shouldered 12 oz jar is a burn test, and a straight-sided candle jar is not.
Pick 3 · The jar most beginner recipes assume
SHOWIN Thick Glass Candle Jars with Wood Lids, 7 oz, 16 pack
SHOWIN
Seven ounces in thick glass with a wooden lid, sixteen to a box. This is the size that lines up with the standard soy wick charts and the quantity that lets you actually test a wick.
#ad · how this is funded · price as of October 23, 2026
Published specifications
- Capacity
- 7 ozSource: Amazon product listing, read 2026-09-02
- Count
- 16 jarsSource: Amazon product listing, read 2026-09-02
- Lids
- WoodSource: Amazon product listing, read 2026-09-02
- Glass
- Described as thickSource: Amazon product listing, read 2026-09-02
- Internal diameter
- Not published on the listing
What that means
Seven fluid ounces of container takes roughly 5.6 ounces of soy wax by weight, at the 0.8 fill factor soy runs at. Sixteen jars is therefore about 5.6 pounds of wax - close to a 5 lb bag plus what stays in the pot.
The listing does not publish an internal diameter, and diameter is what the wick chart needs. Measure across the inside of the glass with a ruler before you order wicks.
Thick glass matters for a real reason: thin glass near a large flame is a crack risk, and a cracked candle jar is a fire.
Good
- Quantity matches a 5 lb bag of wax almost exactly
- Thick glass, which is a genuine safety point
- Lids included, so candles can be given as gifts
Less good
- Internal diameter is not published, so wick sizing needs a ruler
- Sixteen jars is a commitment to one size
Skip this one if
You are still testing which jar size you like. Buy one small pack of two sizes rather than sixteen of one.
Pick 4 · The most jars per order, if you will measure them yourself
Thick Glass Jars with Metal Lids, 8 oz, 24 Pack
Generic (Amazon listing)
Twenty-four 8 oz jars with lids and labels, described as thick glass with high temperature resistance and no figure attached to either claim. Fine glass at a good count, bought on faith rather than on specification.
#ad · how this is funded · price as of October 23, 2026
Published specifications
- Capacity
- 8 oz (240 ml)Source: Amazon product listing, read 2026-10-23
- Count
- 24 jars, 24 black metal lids, 24 labelsSource: Amazon product listing, read 2026-10-23
- Glass
- Stated thick, strong, dishwasher safe, high temperature resistanceSource: Amazon product listing, read 2026-10-23
- Temperature rating
- Not published
- Diameter
- Not published
- Height
- Not published
- Lid seal
- Lined with a thin sheet of foam for an airtight sealSource: Amazon product listing, read 2026-10-23
- Thermal precaution
- Not published
What that means
High temperature resistance with no number is the standard non-specification in this category. It is probably true and it is not checkable.
No diameter at all, which means the wick cannot be chosen before the box arrives with a ruler in your other hand.
The foam-lined lid is worth noting for a different reason than the listing gives: a sealed lid is what a candle needs during its cure, and foam will not survive being put on a jar of hot wax.
Good
- Twenty-four jars, the highest count of the mason-style options here
- Lids and labels included
- Airtight foam-lined lids suit curing
Less good
- No published diameter, so the wick is unknown until you measure
- High temperature resistance is claimed with no figure
- No thermal precaution published, unlike two of the others
- Foam lid liner should not meet hot wax
Skip this one if
You are buying wicks in the same order. Without a published diameter you cannot match them, and a wick bought blind is the most common reason a first candle tunnels.
Pick 5 · A genuinely wide mouth, if you want a bigger candle
CycleMore Glass Mason Jars with Separable Lids, 12 oz, 20 Pack
CycleMore
A 3 by 4.7 inch wide-mouth 12 oz jar, which is the widest glass here and therefore the one that needs the most wick. Buy it for the shape, and budget for a size up or two wicks.
#ad · how this is funded · price as of October 23, 2026
Published specifications
- Capacity
- 12 oz (350 ml)Source: Amazon product listing, read 2026-10-23
- Item size
- 3 x 4.7 inSource: Amazon product listing, read 2026-10-23
- Count
- 20 jars, 40 labels, 1 penSource: Amazon product listing, read 2026-10-23
- Mouth
- Described as wide mouthSource: Amazon product listing, read 2026-10-23
- Lids
- Silver separableSource: Amazon product listing, read 2026-10-23
- Glass
- Stated durable high quality glassSource: Amazon product listing, read 2026-10-23
- Temperature rating
- Not published
- Thermal precaution
- Not published
What that means
Three inches outside on a wide-mouth jar puts the inside near 2.8 inches, which is at the top of what a single standard wick handles well. Expect to go up a size from an 8 oz jar, and consider two wicks.
Separable lids mean the disc lifts out of the band, which is the real mason pattern rather than a one-piece cap. It also means two parts to lose.
This is the only one of the four that publishes neither a temperature claim nor a precaution. Preheat it anyway - the other two sellers in the same category say to.
Good
- Publishes its dimensions
- Genuinely wide mouth, which makes pouring and wick centering easier
- Twenty jars, forty labels and a pen
Less good
- Widest glass here, so the wick decision is the hardest of the four
- Publishes no heat claim and no thermal precaution at all
- Two-part lids
- No internal diameter, like the rest
Skip this one if
This is your first candle. A 2.8-inch melt pool is where single-wick sizing starts to break down, and an 8 oz jar is a far more forgiving place to learn.
Pick 6 · The classic 8 ounce gift candle
DARJEN 8 oz Glass Candle Jars with Wooden Lids, 10 pack
DARJEN
Eight ounces is the size a shop-bought candle usually is, which makes it the size a gift candle should be. Ten in a pack is a sensible first order.
#ad · how this is funded · price as of October 23, 2026
Published specifications
- Capacity
- 8 ozSource: Amazon product listing, read 2026-09-02
- Count
- 10 jarsSource: Amazon product listing, read 2026-09-02
- Lids
- Secure wooden lidsSource: Amazon product listing, read 2026-09-02
- Glass
- Described as premium thick glassSource: Amazon product listing, read 2026-09-02
- Internal diameter
- Not published on the listing
What that means
Eight fluid ounces takes about 6.4 ounces of soy by weight. Ten jars is four pounds of wax, so a 5 lb bag covers a full box with room for the pot.
Standard 8-ounce candle jars usually measure close to 3 inches inside, which on the US soy charts is ECO 10 or CD 14 to 16 territory. Measure yours rather than trusting that.
Good
- The size people expect a candle to be
- Ten is a manageable first batch
- Lids included
Less good
- Internal diameter not published
- Fewer per pack than the 16-jar options
Skip this one if
You are making sample or tester candles. Four-ounce tins burn through faster and cost less per test.
Thermal shock, and what the sellers actually say
This is the part the internet argues about and the listings quietly settle.
Two of the four publish a precaution in their own words. One says to soak the jars in warm water first if you need to pour boiling water inside, especially use as candle containers. The other says please preheat the jars with warm water before pouring wax. Two independent sellers in the same category publishing the same instruction is as close to a specification as this category gets.
What they are describing is thermal shock: glass expands when it is heated, and if the inside heats much faster than the outside the stress can crack it. Canning jars are made to be heated, which is why they survive this at all, and the preheat is what removes the gradient.
- Warm the jars before pouring. Hot tap water for a few minutes, or a low oven, then dry them completely. Water left in a jar flashes to steam under hot wax.
- Pour at the wax's published temperature, not hotter. Golden Wax 464 publishes a 140F pour. That is barely above a hot drink and it is not a thermal shock risk in a warmed jar.
- Do not pour into a cold jar straight from a cupboard in winter, which is the version of this that actually cracks glass.
- Never use decorative or thin glass. Not a drinking glass, not a vase, not a tumbler. A canning jar is annealed thick glass designed for heat; most household glass is neither.
None of the four publishes an actual temperature rating. High temperature resistance appears twice with no figure attached, which is the standard non-specification in this category - and the candle-specific jars in our jar roundup do not publish one either. Nobody is giving you a number here, and a preheat precaution from the seller is better evidence than silence.
Wide mouth, and where it stops being easy
A real wide-mouth quart mason is around three and a half inches across inside, and that is a genuinely difficult candle. The widest jar here is the 12 oz at 3 inches outside, so near 2.8 inches inside, which is at the limit of what one standard wick handles cleanly.
| Jar | Approx inside diameter | Wicking |
|---|---|---|
| 8 oz, 2.67 in outside | About 2.5 in | Single wick, well inside every published chart |
| 12 oz shouldered, 2.87 in outside | About 2.7 in at the body | Single wick, sized to the body not the mouth |
| 12 oz wide mouth, 3 in outside | About 2.8 in | Single wick at the top of its range, or consider two |
| Quart wide mouth | About 3.5 in | Two wicks. One will tunnel |
How many wicks does a candle need works through the threshold properly. The short version is that past about three inches a single wick has to run hot enough to reach the glass, and a wick running that hot produces soot and an uncomfortably warm jar - which is the symptom set in wick too big or too small.
What a mason jar costs you against a candle jar
Honestly, not much, and in one respect it gains.
- You gain a lid that seals. Curing wants a lid on, and a canning jar's whole purpose is a seal. Candle cure time covers why that matters for fragrance.
- You gain thick glass. Canning jars are built for a pressure canner, which is a far harder life than a candle.
- You lose the shape. Candle jars are straight-sided because a straight side is what a melt pool wants. Many canning jars are not.
- You lose nothing in published data, because candle jars do not publish an internal diameter either.
- You may lose the look, depending on what you want. Embossed canning glass reads as a canning jar, which is either the aesthetic or the problem.
On price per vessel the two categories are close enough that it is not the deciding factor. Glass vs tin vs ceramic containers covers the material question, and the straight-sided candle jars in our roundup are there because of the shape rather than any published heat advantage.
Reusing a mason jar you already have
Fine, with the same two conditions plus a third. Check the glass for chips and star cracks around the base first, because a jar that has been through a dishwasher a hundred times is not the jar it was. And clean it properly: label adhesive and food residue both stop wax bonding to the glass, which shows up later as wet spots.
Reusing jars from finished candles is the related case, and reusing old candle wax covers getting the old wax out without cracking the glass doing it.
What we would buy
The 8 oz 20-pack. It publishes its dimensions, it publishes the preheat precaution, it is the size every wick chart is clearest about, and the lug lids suit curing. The Ritayedet 12 oz is the pick if you want a bigger candle and will measure the body rather than trusting the published opening.
And if none of this appeals, the straight-sided jars sold for candles are straight-sided for a reason, and that reason is worth paying for on a first candle. The honest summary of this whole page is that mason jars are safe and slightly awkward, rather than unsafe.
How these picks were made. Published specifications compiled from the sources listed below, the arithmetic shown on the page, and live Amazon prices. No product here has been burned by us. Read the method.
Common questions
Can you use mason jars for candles?
Yes. Mason and canning jars are thick annealed glass built to be heated, and they take a candle. Warm the glass before you pour - two of the four listings in this category publish that precaution themselves - and size the wick to the widest part of the inside rather than to the opening.
Are mason jars safe for candles?
They are safer than most household glass, because canning jars are made for heat. No listing publishes an actual temperature rating, but two sellers publish a preheat instruction, and a soy pour at the published 140F into a warmed jar is a long way from the conditions that crack glass.
Do you need to preheat a mason jar before pouring wax?
Two of the four sellers here say so in their own listings: soak in warm water first, and preheat the jars with warm water before pouring wax. Hot tap water for a few minutes, dried completely, removes the temperature gradient that causes thermal shock.
What size wick does a mason jar need?
It depends on the internal diameter at the widest point, not the capacity and not the mouth. An 8 oz mason at about 2.5 inches inside is a standard single wick; a 12 oz wide mouth near 2.8 inches is at the top of single-wick range; a quart wide mouth at about 3.5 inches needs two.
Why does my mason jar candle tunnel at the top?
Probably because the jar is shouldered and the wick was sized to the mouth. One listing here publishes a 2.24 inch opening on a 2.87 inch body - a wick chosen for 2.24 inches cannot clear the wider part below, and the ledge of unmelted wax at the shoulder is the result.
Can you use any glass jar for a candle?
No. It needs to be thick annealed glass designed for heat. Canning jars qualify; drinking glasses, vases, thin decorative glass and tumblers do not. A jar sold for food preservation has been through a far harder thermal life than a candle will give it.
Are mason jars better than candle jars?
Different rather than better. Mason jars give you thicker glass and a sealing lid that suits curing; candle jars give you straight sides, which is what a melt pool wants. Neither publishes an internal diameter, so you are measuring either way.
Can I reuse an old mason jar for a candle?
Yes, once it is clean and you have checked the base for chips and star cracks. Remove all label adhesive and food residue, because either will stop the wax bonding to the glass and show up later as wet spots.
What temperature can a mason jar take?
Not published. None of the four listings gives a figure, and neither do the jars sold specifically for candles. Two sellers publish a preheat precaution instead, which is the practical guidance in the absence of a rating.
Sources
- Cal Candle Supply - Golden Wax 464 published instructions (heat, fragrance and pour temperatures)
- Lone Star Candle Supply - Guide to Wicking (ECO, CD, HTP, LX, zinc and wooden wick charts)
- CandleScience - How to Properly Wick Container Candles
- National Fire Protection Association - Candle safety guidance
- National Candle Association - candle labeling and fire safety standards (ASTM F2058, F2417, F2179)
Read next
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Top pick
SHOWIN Thick Glass Candle Jars with Wood Lids, 7 oz, 16 pack
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