I have a long haired chihuahua who is hard to fit with all the velcro which caught in his hair so when it was time for a walk he would hide. When I saw this harness with just a buckle, I decided to give it a try. Pookie just loves it. All I have to do is set it on the floor and he steps right in ready to go. This harness says size 3 but I should have bought a smaller size however as long as I can hook it in the last hole, we are happy. Next one I order will be a size 2, guess he has too much hair and I am a poor measurer! By the way, the chihuahua's picture in your catalogue is an exact image of mine, face, ears and color. Very pleased with the color and will be back for another.