Size XS :Neck:11.02 inches, Back:10.63inches, Chest:16.54 inches; <br>Size small: Neck 12.6 inches; Height 11.4 inches ; fit for (Chihuahua, house cat, Pomeranian) <br> Size medium: Neck 15 inches; Height 14.2 inches; fit for (French Bull Dog, Pug, Boston Terrier, Bulldog) <br> Size Large: Neck 21.3 inches; Height 19.7 inches; fit for (Cocker Spaniel, Cattle Dog, Boxer, Pit Bull)