Diameter of 22" (Including Bumper); Depth of 3" Small - Perfect for small puppies and dogs! Recommended Weight and Breeds - Under 15lbs; Yorkshire Terrier, Chihuahua, Italian Greyhound, Pekingnese, Pomeranian, Maltese, Bichon Frise, Pug, Shih Tzu as well as most miniature and toy breeds.