These tough cordura nylon dog boots are water repellant & help protect your dogs paws. These dog boots are used by bird hunters to protect their dogs feet while in the field. The dog mittens are held on with a velco closures. These dog boots come in a set of four, one for each paw. They are available in 4 sizes. Size Small: Paw spread up to 3-1/2 inches. Size Medium: Paw spread 3-1/2 to 4 inches. Size Large: Paw spread 4 to 4-1/2 inches. Size X-large: Paw spread 4-1/2 to 5 inches.