Vivaglory New Sports Style Ripstop Dog Life Jacket with Superior Buoyancy & Rescue Handle This New SPORTS-STYLE dog lifejacket has been designed and extensively tested to give your dog the most ergonomic and comfortable fit possible. 10 different colors available, designed with bright colors and reflective trims to enhance visibility in and out of water or low-light conditions. Size from XS to XL fits dogs of most shapes and sizes. Smart Neck Design: Thoughtful strategically positioned neck design not only provide more space for your beloved dogs but also keep your dog in a natural swimming positon, making them feel more comfortable and eased when wearing. Kindly Tips: The Ribcage Girth should be the most important and decisive measurement to be considered. If your dog's measurement is close to the maximum, next size up is recommended for morecomfortable fit.