This nylon H-Style dog harnessis is good for dogs that have neck problems and can't wear a collar or harness that buckles around the neck. This harness is 1 inch wide 1-ply nylon with a metal buckle in sizes 30, 32, 34, 36 & 38. Chest Strap sizes are to center hole. 2" take-up and let out. Measure you dog around his chest. Order the size closest to his chest size. For example a size 32 harness will adjust from 30 inches to 34 inches. MADE IN THE USA!