A natural rubber ring toy designed to hold up to tough chewers The two layer design is built with a red safety indicator that lets pet parents know it is time to take the toy away from your furry friend Perfect for an interactive game of fetch A great chew toy option for tough and aggressive chewers Easy to clean: just use warm water to wipe goughnuts rings clean after a long day of playing Small ".75" green ring Dimensions: 1.31 inch cross section/3.75 inch diameter Suitable for dogs 10-40lbs Durability scale score: 62 Medium "original" green ring Dimensions: 1.75 crosses sec/5 inch diameter Suitable for dogs 30-70lbs Durability scale score: 80.