DO NOT fit any medium or large dog breeds. Please priority follw the chest size. Size Large, fits 16" back, 18" chest. Recommended for Spaniel Westie, Pug, Boston Terrier Made of 100% ployester, velvet, strechy and super friendly to sensitive skin, perfect to protect the skin and keep your pet warm. Classic designed in christmas floral patterns, further decorated with green bowknot, make your pet more attractive at the christmas party.