NACOCO Pet Christmas Costumes Dog Suit with Cap Santa Claus Suit Dog Hoodies Cat Xmas Costumes Two legs Christmas dog costumes, please pay attention to measure the height of the chest to the ground; Get a super adorable costume for your dog,Be Suitable for Christmas day,Halloweenparty,and etc Match with a Santa caps You will have a cute pet on Christmas! Your pets will be a huge hit and be funny! Many people will thank you for bringing your pets around - really cheer up their season. Size X-SmallHeight 5.1 inches, Chest Circumference 12~16 inches Neck length 9.4 inches, Back length 7.5 inches, Size small: Height 5.5 inches, Chest Circumference 15~17 inches Neck length 11 inches, Back length 9.4 inches, Size medium: Height 6.7 inches, Chest Circumference 17~19inchesNeck length 12.6 inches, Back length 11 inches, Size Large: Height 7.5 inches, Chest Circumference 19~21 inches Neck length 15 inches, Back length 13.4 inches, Size X-Large: Height 8.3 inches, Chest Circumference 23~26 inchesNeck length 16.5 inches, Back length 14.6 inches, It is recommended that you measure your dog&#039;s chest circumference and the standing height and neck circumference. chest circumference is the perimeter of the widest of dogs chest. the standing height is from your dog foot to your dog neck. The pet costumes is a standing clothingplease mainly consider the chest circumference and neck circumference and standing height. and back length is the auxiliary factor. Your baby usually wears size S doesn&#039;t mean all size S will fit him/her. If any of the measurements are &#039;between&#039; two sizes, choose the larger size Remind you note: pet clothing chest circumference should be greater than the actual chest circumference of dog, it is convenient for its activities. Please consider 0.5 inch error.