1. Please check the size chart on the picture carefully, you need to measure the length of your dog's chest, neck and back. Our small dog sweaters are not suitable for large dogs. 2. Dog Sweater Size,Suitable for small and medium dogs. Suitable for puppies, puppies, yorkies, chihuahuas, teacups, toy poodles, mini chihuahuas, mini poodles, chihuahuas, and also suitable for medium-sized dogs, such as terriers, maltese, poodles, schnauzers, Pomeranians, poodles, french bulldogs and so on. 3. Made of cotton. Soft and cozy, soft and fluffy fabric keeps your dog warm on especially cold days. 4. Round neck, long sleeves, warm design, protects from healing scars, allergies or other skin problems, prevents licking and scratching rashes during recovery, puppy onesie style. 5. This dog pajamas has open crotch and back with buttons, it can be taken off easily, no need to take it off when your dog goes to the toilet. Puppy pajamas are suitable for daily indoor and outdoor activities, and when the air conditioner is turned on in winter, the puppy clothes pajamas can be very good for preventing pets from catching cold.