Dog collar built with heavy-duty nylon or polyester webbing, a 1-inch acetal side-release buckle (~320LB breaking strength), and a welded steel D-ring. Adjustability: Custom-made with ~6 inches of adjustment range. Maximum length is exact; collars may adjust slightly smaller than the minimum. Sizing & Returns: Measure carefully before ordering to ensure your selected size is suitable. Collars are non-returnable due to sizing errors. Refer to our sizing guide below for proper fit.