What Size Do Mason Jars Come In? | Full Capacity Guide

Standard Mason jars come in eight main sizes from 4 oz (quarter-pint) to 64 oz (half-gallon), with the 16 oz pint being the most versatile choice for canning and storage.

One wrong jar size ruins a batch. Mason jars look similar on a shelf, but a 12 oz jar swapped for a 16 oz recipe means under-processed food and a trashed canner. The standard range covers seven glass sizes, plus one plastic-only outlier. Below is every size, what it actually fits, and the mouth-type trap that trips up beginners.

The Eight Standard Mason Jar Sizes at a Glance

All glass Mason jars from Ball, Kerr, and Bernardin follow the same capacity and mouth-size standards. The list starts at 4 oz and runs up to 64 oz — one gallon jars exist but are plastic-only or non-standard in glass.

• 4 oz (quarter-pint): 120 mL / ½ cup. Regular mouth only. Best for jams, jellies, and party favors.
• 8 oz (half-pint): 240 mL / 1 cup. Comes in regular or wide mouth. Works for sauces, honey, and small-batch candles.
• 12 oz (three-quarter pint): 360 mL / 1½ cups. Regular mouth (some wide variants exist). A common size for honey and specialty preserves.
• 16 oz (pint): 480 mL / 2 cups. Available in both regular and wide mouth. The all-around workhorse for pickles, salsa, and freezer-safe canning.
• 24 oz (pint-and-a-half): 720 mL / 3 cups. Wide mouth only. Good for layered salads, overnight oats, and large preserves.
• 32 oz (quart): 960 mL / 4 cups. Regular or wide mouth. The go-to for pickles, soups, and whole tomatoes.
• 64 oz (half-gallon): 1,920 mL / 8 cups. Wide mouth is standard. Used for bulk storage, sun tea, and kombucha fermentation.
• 2 oz (plastic only): Not made in glass. Not heat-safe for canning. Used for samples or dry storage only.

Capacity, Dimensions, and Mouth Type Quick Reference

The table below shows the exact specs for every standard glass Mason jar size, so you can match jars to recipes without guessing.

The Mouth-Type Trap: Regular vs. Wide

Lids are not interchangeable between regular and wide mouths — a wide-mouth lid will not seal a regular jar, and a regular lid won’t cover a wide opening. Check the inner diameter: regular mouths measure ~2.375 inches across, while wide mouths measure ~2.75 inches. A quick test with a tennis ball helps: if the ball sits on top of the jar opening, it’s regular mouth; if it falls in, it’s wide mouth. For practical pickup and use, many home canners prefer wide-mouth jars for easier filling, especially for large pieces like apples or pickles. If you’re looking for a trusted product that handles bigger batches well, our tested 32 oz wide mouth jar roundup has current picks and honest trade-offs.

Which Size Should You Use for Canning?

Ball’s official guidance says to select the jar size based on the recipe, not on volume alone. Here is how the manufacturer recommends each standard size:

• 4 oz (regular): Jams, jellies, mustards, ketchup, dipping sauces, flavored vinegars.
• 8 oz (regular or wide): Jams, jellies, conserves, preserves, fruit syrups, chutneys, pizza sauce.
• 12 oz (regular): Jams, jellies, marmalades.
• 16 oz (regular or wide): Salsas, sauces, relishes, pie fillings. Freezer safe on both mouth types.
• 24 oz (wide): Asparagus, pickles, sauces, soups, stews. Freezer safe.
• 32 oz (regular or wide): Pickles, tomatoes, whole or halved fruits and vegetables.
• 64 oz (wide): Apple juice, grape juice, and fermentation projects.

All sizes labeled as freezer safe need ½ inch headspace to allow for expansion — skip that and jars crack or lids pop off during freezing.

Three Common Mistakes and How to Avoid Them

Even experienced canners trip on these. Here’s what to watch for:

• Mistaking mouth types: A regular lid on a wide jar or vice versa means a failed seal and spoiled food. Match the lid to the jar opening, not the jar brand.
• Substituting 12 oz for 16 oz in recipes: The 12 oz jar is a three-quarter pint, not a standard pint. Using it for a recipe designed for 16 oz throws off processing time and food safety.
• Assuming 2 oz jars are glass: Only plastic 2 oz jars exist. They are not heat-safe for canning — use them for dry goods or samples only.

Your Quick-Reference Jar Selection Checklist

Use this checklist when you’re standing in front of a shelf or planning a batch:

• Match the jar capacity to the recipe volume — never guess based on jar height alone.
• Identify the mouth type (regular: ~2.375″ inner diameter; wide: ~2.75″ inner diameter) before buying lids.
• For freezer canning, confirm the jar is labeled “Freezer Safe” and leave ½ inch headspace.
• For fermentation (kombucha, sun tea), use a 64 oz wide-mouth jar to allow proper air exchange.
• Stick with glass sizes between 4 oz and 64 oz — larger than 64 oz may not be standard Mason jar glass.