PERFECT FIT - Available in 7 sizes from XXS to XXL to cover puppies through large dogs. Please measure your dog's ribcage girth at the deepest part and refer to the size chart to choose the right size. If your measurement falls between two sizes, choose the larger for a more comfortable fit. SIZE INFORMATION - Chest and back length per size: XXS: Chest 10-14 in, Back Length 5.9 in XS: Chest 12-16 in, Back Length 8.3 in S: Chest 15-20 in, Back Length 10.2 in M: Chest 17-24 in, Back Length 11.8 in L: Chest 20-29 in, Back Length 13.8 in XL: Chest 26-37 in, Back Length 17.7 in XXL: Chest 37-48 in, Back Length 18.9 in DURABLE & COMFORTABLE - Delicately crafted with high-density abrasion-resistant Oxford and Nylon fabric, combined with pearl cotton foam. This dog swimsuit provides buoyancy while allowing freedom of movement in the water. ADJUSTABLE & SAFE - Adjustable belt and quick-release buckles for a secure, comfortable fit. Top grab handle enables rescue by hand or with a boat hook in the water. Heavy-duty D-ring for a leash. Reflective stripes and bright colors enhance visibility. Front float helps keep the dog's head above water. NOTE - We may suggest choosing a larger size than usual, as the fabric is relatively thick. Please measure your pet carefully. Practical use scenarios: - Swimming in pools, lakes, or rivers to provide buoyancy and safety - Boat trips or beach outings where quick rescue and high visibility matter - Training and water play to help keep the head above water and build confidence