S ( Back Length: 9.8 inch, Chest Girth: 13.7 inch,Neck Girth:9.4 inch ),within 5.5 lb. Pls pay attention to the size before payment ! Coral velvet material,machine-washable. Adorable Outfit for Small Dogs.Easy to wear off. Keep good temperature while not being stifling, suitable for cold autumn/winter outdoor sportswear. Suitable for Christmas day, Halloween, birthday party,and etc.