PlayaPup Dog Life Jacket PLEASE READ: Please refer to our size chart since sizing can vary by brands (last image under product images) MEASURING TIPS: Life vests fits most dogs, but be aware that all dog breeds are not built the same. Use a soft measuring tape and always make sure not to measure too tightly by allowing sufficient room to slip two fingers between measuring tape. Chest girth should be the most important measurement to be considered. MEASURING TIPS: Life vests fits most dogs, but be aware that all dog breeds are not built the same. Use a soft measuring tape and always make sure not to measure too tightly by allowing sufficient room to slip two fingers between measuring tape. Chest girth should be the most important measurement to be considered. COMFORT AND SAFETY - Pet life vest ensures the safety of your canine buddy with a strong and durable neoprene outer cover, comfortable form fitting EVA foam filling is great for buoyancy, breathable mesh at underbelly and neck for extra comfort, under neck flotation to keep head above water. DOG LIFE VEST FEATURES: High visibility reflective accents throughout for added safety, adjustable straps and Velcro and buckle closures at underbelly/neck to ensure vest will stay put, strong grab handle to help guide your dog, a d-ring for a leash, colorful print and logo on both sides.