The Pet Life 'Aero Mesh' 360 Degree Dual-Sided Adjustable Mesh Dog Collar offers complete comfort and ventilation. This collar features Dual-sided premium Micro-Mesh plush fabrics that are fused together to create exceptional Breathability. Superior in comfort as compared to conventional Nylon or tougher-grade fabrics that lay around the neck, the Aero-Mesh collar gently cuddles and places less stress around the neck area. Features an Ultra-Sturdy Buckle Clip with a protective mesh layer preventing hairs from getting caught or pulling and a reinforced Stainless steel leash connecting ring meant to withstand high tug pressure. Collar is 100% Water-resistant and Machine Washable. Available in Multiple Sizes and Colors, Matching Leash or Lead Sold Separately. NNSIZING DIMENSIONS: In Inches. NSMALL: Neck Circumference: 11" - 15.8"NMEDIUM: Neck Circumference: 13.4" - 19.8"NLARGE: Neck Circumference: 14.9" - 23.2" Pet Life Blue Dog Collar, Small - 1 Inch Width, Breathable Mesh, Stainless Steel Harness Ring | CL14BLSM