Everyone has you covered for,information on the K9 Julius Harnesses. I love ours, they fit well, are easy to put on and take off, are adjustable, they fit comfortably, they are light weight, comes in tons of colours, and I love the name tags. My two guys are about 45 and 48 lbs, and I bought the Size 1, and they fit great. Blossom has the pink one, and Bulldozer has the Green Camouflage.