Suitable for most dog sizes: 5 sizes for dogs of different sizes, such as Chihuahua, Yorkie, French Bulldog, Boston Terrier, Corgi, Pomeranian, Foxhound, Schnauzer , Shih Tzu, and so on. Soft, flexible, breathable, washable, cotton material for added comfort.Machine-washable, with similar color items, in cold water on the gentle cycle. Soft and breathable cotton fabric bring dog comfortable wearing experience, however, cotton material will shrink a little after washed, if your measurements approach the upper end of the range given for size chart, larger sizes maybe more suitable for your dog. Besides, it's better to wash shirts with cold water which may decrease shrink. Soft Material:Our shirts are made from 98 cotton and 2 polyester,which can give your pets a better feeling,suitable for pets in summer. Attention that your baby pet usually wears a size S doesn't mean all size S will fit him her. Please check the size chart in ' ' before purchase.If the measurements are 'between' two sizes, choose the larger size.