Please measure length,neck,and chest of your pet, It is better to choose the sweater size based on the chest of your pet,The measurement chart is as following:
Size information:
Size:XS Back Length :19cm/7.48'' Bust:22-26cm/8.7-10.2'' Fit For Weight:0.5-1.5Kg/1.1-3.3LB
Size:S Back Length :23cm/9.06'' Bust:27-32cm/10.6-12.6'' Fit For Weight:1.5-2.5Kg/3.3-5.5LB
Size:M Back Length :28cm/11.02'' Bust:31-37cm/12.2-14.5'' Fit For Weight:2.5-3.5Kg/5.5-7.7LB
Size:L Back Length :31cm/12.20'' Bust:38-41cm/14.9-16.1'' Fit For Weight:3.5-4.5kg/7.7-9.9LB
Size:XL Back Length :34cm/13.39'' Bust:42-47cm/16.5-18.5'' Fit For Weight:4.5-7kg/9.9-15.4LB
Perfect for small medium size pet,eg cat,poodle,cup poodle,bichon frise,yorkshire terrier,Teacup, Miniature poodle, min pin,Toy poodle, Chihuahua, Pomeranian, Yorkie,Maltese, Maltipoo, Shih Tzu Puppy, Dachshund,French bulldog, Maltese, Boston terrier, Scottie
Tips:Please measure your pet's size before buying.The Size Selection recommended to be 2-3cm larger than your actual size of the dog.