Size S: neck circumference 10 inches, chest circumference 15 inches, back length 10 inches, please refer to our size chart to measure your dog’s size before ordering. High quality material: dog sweater is made of high quality acrylic yarn, which is very soft, comfortable and warm. Button knit sweater is exquisite and fashionable. DIY button design: You can easily see the button design on the clothes. This is our unique design, which makes our sweaters stand out among many designs. When you take your pet friend out for a walk, it will be very fashionable. Comfortable and retractable: Our pullover dress is very soft and retractable, and the simple short sleeve design makes it easier to wear and take off. Washable: This sweater is machine washable, circulates gently in cold water, and should be hung to dry