MEASURE BEFORE PURCHASE: before choosing a size, please measure your dog's ribcage at the DEEPEST part; do NOT judge your dog's size from weight or other brands' standard; if your dog's measurement is between sizes, please choose the next size up FOR DOG'S SAFETY: dog PFD by Vivaglory is constructed with extra padding to enable strong buoyance in the water without restricting your dog's movement. Fastening system around belly and neck will keep the flotation vest securely on your dog CONVENIENCE & FIT: durable grab handle of the dog life preserver makes it easy to pull your dog out of any emergency. D-ring is for attaching dog leash. Adjustable straps and quick-release buckles ensure perfect fit for your dog HIGH VISIBILITY: comes with ten bright colors and reflective trims, this dog water vest enhances your dog's visibility in and out of the water, allow you to identify your dog quickly EE157-o