SIZING - Small Vest Fits Dogs 22lbs - 34lbs; Top of Shoulders/Base of Neck Measuring a Diameter 17.0" - 21.0"; Chest Measuring a Diameter 21.5" - 27.5" BRIGHT AND VISIBLE, DAY OR NIGHT The SafetyPUP XD URBAN reflective dog vest is engineered to provide superior visibility around the clock, minimizing the risk of automotive accidents TOUGH ENOUGH TO USE EVERY DAY Our vest is built from premium quality rip-resistant 300D Oxford Weave fabric with double stitched straps for maximum durability and weather protection UTILITY STRAP INCLUDED For added convenience we've added a utility strap to the side of the vest. Hang a poop bag or carabineer to hold lightweight accessories.