Product Description WARM TIPS: 1. Please follow the size chart to get the right sweater for your pet. 2. If your pet sweater is between two sizes, please choose the bigger one. 3. The size chart data is measured by hand, there will be 0.5-1in error, which is normal. Package included: 1 x Dog Pajamas MEASURE YOUR DOG: Measure your dog at the widest part of the chest and rib area to determine your dog's waist circumference. Please allow two fingers for comfort. Do not purchase a specific size, please check our size guide strictly to choose the right size for your dog. DOG FLEECE PAJAMAS: Pajamas are made of soft stretch fleece to provide ultimate comfort, warmth and stretch for your furry friend. Machine or hand washable. ELASTIC DESIGN: The four-legged dog pajamas provide all-over warmth for your dog, with an elasticized waist to help with the perfect fit, and elasticized ribbing at the cuffs and neck to effectively lock in the warmth without constricting your furry friend. Allow your fur kids to play and move freely. DOG CHRISTMAS PAJAMAS: Our pajamas are designed with classic checkered pattern, perfect for pets who love to decorate. Make your pet look cute and eye-catching, making this dog onesie a perfect match for Christmas, New Year, Valentine's Day and all holidays. WIDELY APPLICABLE: This dog heart sweater is suitable for dogs and cats to wear in various occasions, such as daily wear, Valentine's Day, Christmas, weddings, pet birthday parties, pet beauty contests, photo props, festivals, etc.; It is also a good gift for your friends who have pets, and it is a must-have apparel for every pet's closet.