Neck: 11", Chest: 15", Back: 11.3". We strongly recommend that you measure your pet first for the best fit, extra fluffy pet please measure above the fur. If your pet is at the maximum fit for a size, we suggest you size up to allow for more adjustments. Novelty Design: Unique chest design to fit the skeleton of your pet, comfortable and beautiful. High-cut belly allows for both boys and girls to use the bathroom without getting wet. Stylish and Eye-catching: Decorated with the words "Mommy's Boy" printed on the back, perfect for everyday wear, holiday, jammies, party and drag show, making your photos awesome. keeping your pet cute and very popular, you will get tons of fun and compliments. Material: Made of soft polyester, comfortable, light weight and easy to clean, keeping your dog or cat feel great in all types of weather—because fashion should never come at a sacrifice. Machine-washable, with similar color items, in cold water on the gentle cycle. Line dry, do not tumble dry, do not bleach. Novelty design and color scheme, stylish and eye-catching, keep your pets cute and very popular, you will get tons of fun and compliments.