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There are only TWO lid sizes for Mason jars – regular and wide mouth – and the difference between them is less than an inch. So whether you have a 4 oz regular mouth jelly jar or a 32 oz regular mouth quart jar – the lid size doesn’t change!
Mason canning jars have either regular mouth or wide mouth lids. Please refer to the chart below to determine what label size you need for your lids. When adding to the FRONT of the glass, 2" or 2.5" round labels will work on regular 8 oz half pint jelly jars or larger jars.
Below is an easy to read mason jar lid size chart for your convenience. As you can see by the image above with the sizing listed for both regular mouth and wide mouth lids, there is really on about a .63″ difference between the two.
How Canning Lids Work. When you put your filled jars in a canner to process, the screw band fits over the flat lid and screws down to hold the flat lid in place during processing. Bacteria or spoilage causing organisms are killed by the correct level of heat in the canner.
Let’s chat through the various mason jar sizes and how to use them around your home! While the idea of a “glass jar with a metal lid” is rather common these days, this article specifically focuses on Ball ® (and Kerr®) mason jars (or “canning jars”) and some similar brands.
Generally, typical mason jars have a 70/450 finish and would require that size of lid. However, there is also a “short skirted” CT finish; with a 70/400 finish. We show examples of these later in the post.
Wide-mouth jars have an opening of about 3-1/2 inches in diameter; narrow-mouth jars are about 2-3/4 inches across. Two-part canning jar lids come in these two sizes, so you should be able to find some somewhere if this small size is what you have. Good luck!
To decide which type of mason jar you need for which projects, you will need to learn the different types of sizes of mason jars. The two main ways that mason jars are classified are by capacity or mouth diameter.
To make shopping a little easier, we've put together this handy guide to determine what size mouth your Mason jars have with links to their corresponding Masontops products. The most important thing to remember is brand, volume and height have nothing to do with determining mouth size.
What are the sizes of Mason jar lids? Regular mouth: 2 ⅝” diameter, with a 2” diameter inner flat area and a ⅝” ridge around the circumference. Wide mouth: 3 ⅜” diameter, with a 2 ⅝” diameter inner flat area and a ¾” ridge around the circumference.