How many oz in a mason jar?

"Mason jar" covers a whole family of sizes, so "how many ounces" depends on which one you have in your hand. Here is the full range.

Common mason jar sizes

Mason jars are sold by volume, and the standard steps are:

• 4 oz (quarter pint): for jams, spices, and favors
• 8 oz (half pint): a common jam and condiment size
• 16 oz (pint): the everyday all-rounder
• 24 oz (pint and a half)
• 32 oz (quart): for pickling, bulk storage, and drinks
• 64 oz (half gallon): for bulk liquids and fermenting

The two you see most often are the 16 oz pint and the 32 oz quart.

Regular vs wide mouth

Both come in regular-mouth and wide-mouth openings. The volume is the same for a given size; the wide mouth is just easier to fill and clean, which is why it is popular for pickling and dry goods. The opening size also decides which lids fit.

Headspace matters

The stated size is the jar's full capacity, but you rarely fill to the brim. Canning and fermenting need headspace at the top, so a 16 oz jar holds a bit less than 16 oz of product once you leave room.

Labeling and packaging jars

If you are selling a product in mason jars, the label has to wrap the curve cleanly and survive moisture and handling. Durable wrap-around labels suit jarred goods; for candles in jars specifically, see our candle labels.

The short version: mason jars run from 4 oz up to 64 oz, with the 16 oz pint and 32 oz quart being the most common.