Description Designed for larger breeds, this dog collar is extra wide to keep your big dog comfortable. Durable nylon webbing stands up to hikes through the woods and muddy dog parks. An adjustable two-prong buckle provides a secure fit. Features Durable bullet nylon webbing fabric Wide collar prevents discomfort for dogs with large necks Two-pronged metal buckle Reflective webbing strap keeper for low-light visibility Metal leash attachment loop Adjustable metal grommets Medium 15-20" (L) X 1.5" (W) Large 20-25" (L) X 1.5" (W)