Our sugnature leather dog harness is very soft and comfortable for your dog. This soft leather dog harness has 5 adjustable metal buckles. For correct size please measure your dog. Neck: Measure around the dogs neck just below where the collar fits. Chest: About 4 to 5 inches behind the front legs measure all the way around the dogs body. Medium: The chest strap adjusts 28-34 inches. The neck strap adjusts 19-25 inches. Large: The chest strap adjusts 31-37 inches. The neck strap adjusts 21-27 inches. Extra Large: The chest strap adjusts 38-45 inches. The neck strap adjusts 22-28 inches.