Halloween Pet Apparel Puppy Orange Pumpkin Sweatshirts for Small Dog and Cat Recommend to choose the right size according to the methods below. 1. According to the length of Pet Chest and Body 2. According to the range of Pet Weight. Size Chart: Size -----------Chest --- ---------Length ---------Recommend weight XS:-------------10.6 "-------------6.3 "------------(1.4 -2.6 )lb S :--------------12.6 "-------------7.9 "------------(2.6 -4.4)lb M:--------------14.6 "-------------9.8 "-----------(4.4 -6.6) lb L:---------------16.5 "-------------11.8 "----------(6.6 -9.4) lb XL:--------------18.5 "------------13.8 "-----------(9.4 -13.2 )lb XXL:-------------20.5 "------------15.7 "-----------(13.2 -17.6 )lb How to measure your pet: (Make sure your dog is standing properly,not sitting,or laying dowm.) Chest: Measure the thickest part of chest.(Usually behind the legs) Body: Measure from along the dog's backbone from the base of the neck to 5cm front of base of tail.