Need a lid for a wide mouth mason jar? You're in the right place. Need a lid with a long tube that will reach to the bottom of a quart size jar? This is where you need to be. Not sure if you have a regular or wide mouth mason jar? Just measure across the top rim of the jar - not the lid. If your jar measures roughly 2 ½ inches at the top you have a regular jar. If your jar measures roughly 3 ¼ inches you have a wide mouth jar. Will the tubes on these lids reach to the bottom of your jar? If your jar is taller than 5 inches you will need a quart size lid.