Wayson Adjustable Nylon Camouflage Dog Collar with Alloy Square Buckle, Practical and Fashion Supplies (Blue/Green) Material:Nylon+Alloy Square Buckle Adjustable Neck Circumference range: 2.36 Inches. Fashion camouflage collar, blue and green colors are optional. Adjustable collar Design provides convenient and quick release and adjust the tightness. For the strongest of dogs and the excited-jumpy puppies, the collar is the perfect way to insure safety and security during your daily walks.