BINGPET BB5005 Classic Soft Vest Dog Puppy Pet Harness Adjustable Small Aqua Blue 12"-12.6" Chest Girth / 9.8" Neck Girth.The adjust of velcro strap is limited.Please measure your pet as attached picture.Some customer replid the size is smaller than store size,advise the upper size if your pet size in the end of border. Bingpet harnesses provide owners with a secure, comfortable, and controlled way to walk their pets Soft Air-mesh harness comfortable for any dog Made of 100% Polyester,it also very light weight with velcro and plastic clip closure and two heavy duty D-rings for added security. Quick release buckle & adjustable chest belt.You will love these vests. IMPORTANT:Please do not purchase the harness based on the size of another manufacturer/designer.You have to take various measurements into consideration before you purchase this harness.