Size: small collar: 10"~13"(25~33cm), bust: 10"~13"(25~33cm), back length: 9"(22cm). Medium-Neck: 15"~21"(38~53cm), Bust: 15"~23"(38~58cm), Back length: 11"(28cm) Large-Neck: 19"~26"(48~66cm), Bust: 24"~34"(61~86cm), Back length: 13"(34cm) High-quality materials: The life jacket is designed with an inflatable cushion, which is more buoyant than ordinary foam dog clothes on the market. It not only ensures the safety of your pet dog, but also is very suitable for all boating, sailing and other water sports activities with your pet dog. Special design: The life jacket is designed with high-visibility colored fabrics and reflective strips to keep your dog in your sight. Comfortable enough: Adjustable hook and loop buckles on the neck and abdomen ensure that your pet is in the most comfortable body shape when wearing this life jacket, allowing your pet to swim unimpeded and comfortable enough on the water Metal buttons, quick release buckles and safety handles: triple safety protection, wider and thicker handles on the back, allowing parents to feel better when training or catching dogs for a long time Product description Highly visible colors and reflective stripes Great buoyancy Foldable dog life jacket Quick release buckle and safety handle Easy to carry