K9 Optix Copper Sunglasses by Doggles are the ultimate in eye protection and fashion for dogs. 100% UV protection, shatterproof, anti-fog lenses, super flexible rubber frames, interchangeable/removable lenses, and adjustable head and chin strap. Copper mirror sunglasses with paw print rhinestone designs. Sizes: X-small (under 10 lbs.), small (10-25 lbs.), medium (20-60 lbs.), and large (50-95 lbs.).