instruction：Dog Coats Small Waterproof,Warm Outfit Clothes Dog Jackets Small,Adjustable Drawstring Warm And Cozy Dog Sport Vest.How to measure the dog size? Chest: measure the thickest part of the chest, add 2-3CM (1 inch) 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 (2 inch) front the base of the tail. Neck: the girth of the neck, add 2-3CM (1 inch) 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 Chart Please do measure the size of your dogs and compare to the size chart below or in the pictures. (XS) Back Length: 30CM / 11.81" inch (S) Back Length: 35CM / 13.78" inch (M) Back Length: 40CM / 15.74" inch (L) Back Length: 45CM / 17.71" inch (XL) Back Length: 50CM / 19.68" inch (2XL) Back Length: 55CM / 21.67" inchPackage contains:1 pc in 1 PE bag The Jacket Keep Your Dog Warm The jacket wraps around your dog`s body to help keep them warm and protect on cooler days, with a high collar to keep the chill off their neck. The adjustable waist belt and neck toggle provide a snug fit whilst the waterproof fabric keeps them dry on a long day of adventure. · How to Wear and Clean？ Adjust the straps of the coat to ensure a snug fit and thread the lead through the hole in the back of the coat to prevent snagging. After a day of great adventure, simply pop into the washing machine to keep fresh and clean.