The regular mouth Mason jar sleeves are made to fit any standard 16-oz pint Mason jar glass (Ball or Kerr). These are standard canning jars sold at most supermarkets in the USA. The regular mouth mason hugger has a leather bottom to ensure that your tasty beverage doesn’t slip out of the sleeve. This product is assembled using copper rivets and hand-stitched up each side. Finally there is a way to tote your glass mason jar around in style.