AVA is an adjustable collar that is 100% water- and odor-proof with a quick-release cobra buckle for security and convenience. Quick-release metal buckle collar Sizes & weights S: ¾" (2 cm) wide · 0.14 lb (63 g) M: 1" (2.5 cm) wide · 0.21 lb (98 g) L: 1" (2.5 cm) wide · 0.23 lb (105 g) Measure while your pet is standing. Do not size up for this collar—purchase using the exact measurement for the best fit. SECURITY The quick-release buckle keeps your dog secured when needed, yet allows for easy removal in urgent situations. COMFORT-FIT INTERIOR Designed to reduce rubbing and minimize pressure points on the skin and neck. Made with our signature pliable, ultra-soft vinyl-coated nylon webbing. 100% waterproof and odor-proof Rust-resistant hardware Military-grade metal buckle for extra security Solid cast D-ring