- The Boomer Ball is the perfect durable hard wearing toy.|$|- It is virtually indestructible and is ideal for those ball-obsessed toy destroyers.|$|- It can also be used as a therapeutic toy to enrich the environment of elephants, pigs, polar bears or any other bored inquisitive animal.|$|- The size selected should be larger than your dogs maximum jaw gape.|$|- Size Guide: 4 inches: Jack Russell/Westie/Yorkshire Terrier, 6 inches: Border Collie/Bulldog/Springer, 8 inches: Boxer/Pointer/Bull Terriers/Dobermann, 10 inches: Bull Mastiff/Great Dane/Rottweiler/German Shepherd.|$|- Size:8 Inch.|$|- Gender: Unisex Adult