Bow Tie Dog Tuxedo Harness Paid Style for Boy & Girl Size XS: neck size 8.6 inches, chest size is from 11.4 to 15.3 inches. If you are not sure about the size, you can ask me for size suggestions. Gentleman Style Dog Harness. Best for birthday, wedding, and parties. The harness is made of 101% polyester soft air mesh, which makes your puppy comfortable and safe. This bow tie dog tuxedo harness is chest size adjustable. There is a size adjustable belt on the back of the harness, which you can use to adjust the chest size. You can see what pictures show. Machine washable.