This auction is for an Outward Hound life jacket so you can safely take your doggie on boat outings! The life jacket looks like it has hardly been used, though it has 1 very small dark spot on it - barely noticeable. It measures about 17" long and about 24" around the middle. The life jacket can be adjusted to the size that fits your pooch, whether she's thin or a little bigger. It has velcro closures and adjustable straps. I'd say it's a size S-M.