Sporn Durable Marrow Chew Bonesare the chewable nylon bones with“Jerky Flavor Down the Middle!”Perfect for strong chewers, nylon shavings act like a toothbrush and help remove tartar from the dog’s teeth. Unlike traditional rawhide bones, this bone will last!

X-Small:Recommended for dogs under 10 pounds(.75″ x3.5″)
Small: Recommended for dogs between 10-25 pounds(1″ x4″)
Medium: Recommended for dogs between 25-40 pounds(1″ x5″)
Large: Recommended for dogs between 40-80 pounds(1″ x7.5″)
X-Large: Recommended for dogs over 80 pounds(1.5″ x9″)