UNIVERSAL SIZE--The pet food can cover has three rings, Inner Diameter are 2.5"" 2.9"" 3.3"" and stretches a bit, Fits standard type of Pet Cans,like 3 oz,5.5 oz and 12 oz cans. EXCELLENT AIRTIGHT--The lid is made of silica gel which is very soft and flexible,allow to fit snugly and grip the rim of the cans giving a good seal.keep the food fresh longer and and prevents the fridge from smelling like pet food. SAFE and NONTOXIC--These dog cat food can lids are Made of Premium Silicone at food grade,BPA free,safe and nontoxic,could restore with food long time with no harm. EASY to USE--Quite flexible and pliable, easy to pull on, and they have a little handle with bump design for easy removability. DURABLE--Silicone can covers will not crack,melt,or warp. Withstand high temperature. Dishwasher safe.SAFE and NONTOXIC--These dog cat food can lids are Made of 100% Premium Silicone at food grade,BPA free,safe and nontoxic,could restore with food long time with no harm.EASY to USE--Quite flexible and pliable, easy to pull on, and they have a little handle with bump design for easy removability.DURABLE--Silicone can covers will not crack,melt,or warp. Withstand high temperature. Dishwasher safe.