How to measure the dog sizeChest: measure the thickest part of the chest, add 2 3CM will be better. (Usually behind the two legs) Length: Make sure your dog stands properly, not sitting or lying. Measure along the dog's backbone from the base of the neck to 5CM front the base of the tail. Neck: the girth of the neck, add 2 3CM will be better. Note: If your dog is a large chest, long hair, or at the high end of the size, you may order the next larger size to ensure a comfortable fit. Size Details: This dog clothes is for small toy dogs or cat under 20 pounds 10KG Size S: Neck: 23cm 9.0inch Back: 20cm 8.0inch Chest: 32cm 12.5inch for weight 2.7-4.4 pounds 1.25-2.0 KG Size M: Neck: 26cm 10inch Back: 25cm 9.5inch Chest: 37cm 14.5inch for weight 4.4-6.6 pounds 2.0-3.0 KG Size L: Neck: 29cm 11.5inch Back: 30cm 11.5inch Chest: 42cm 16.5inch for weight 6.6-9.4 pounds 3.0-4.25 KG Size XL: Neck: 32cm 12.5inch Back: 35cm 13.5inch Chest: 47cm 18.5inch for weight 9.4-13 pounds 4.25-6.0 KG Size XXL: Neck: 35cm 13.5inch Back: 40cm 15.5inch Chest: 52cm 20.5inch for weight 13-19.5 pounds 6.0-9.0 KG Breed Recommend: (for reference only): Size XXS,XS: teacup, kitten,puppy,chihuahua ( weight under 2lbs 1kg) Size S,M,L: cat,puppy,chihuahua, pomeranian, maltese, yorkshire terrier (weight 3-10lbs 1.5-4.5kg) Size XL.XXL: toy poodle,papillon,shih tzu,mini doberman,bichon frise,pekingese,jack russell terrier,miniature schnauzer,pug(weight 11-20lbs 5-9kg) The recommend weight is just for reference, please kindly take a measurement of your dog before buy,thanks.This girl dog dress have size S, M, L, XL, XXL. Suitable for small breeds dogs cats. Usually choosing the size by measuring in CHEST, BACK, NECK, not weight or breeds merely. Give priority to measure CHEST, not too tight, and leave 2-3 finger's space for best fit comfort. Please refer to the size chart clearly before ordering. Machine washable so you can keep it looking stylish with less effort. Cute pet harness dress with D-ring and matching leash. The chest part is adjustable. Mesh padded for comfortable wear. Perfect for any festival outdoor activities, like daily walking, weekend parties, Valentine's, Halloween, Christmas, birthdays, wedding, pet themed party, etc. Made of soft polyester fabric which is lightweight and breathable. Stylish princess dress with big flowers patterns and bow. Suitable for warm spring or summer months.