About this item M: Back Length 11.42", Chest Girth 15.75", Neck 10.24"; Measure your dog from the base of the neck to the base of the tail for back length. Super vibrant color and adorable print Perfect for PJ themed party or unrestrained "Pajama Day" A good idea for dogs, especially for fur baby having some allergy issues, which primarily prevents him/her from itching. The four legged jammies considerately make sure to keep pets hindquarters warm as well, but plenty of room to do his/her business (pee/poop) and not soil the fabric.