I have a full size doberman and I bought the size 32” for him. It was too big and the next size smaller that was available was the 24” a 26” would have fit better but the 24” fit well enough. It is designed for a wider dog than mine. The Wether Beater is a very well built heavy duty jacket. It has a good range of adjustment. If it is put on tight it will block any drafts. My dog plays very rough with other dogs and I have had no real problems with it. Every time I take it out my dog can’t wate to get it on. I gave it four stars because the coller should be stiffer and the coller’s fabric collects other dog’s hair. Also the zipper’s tab jamed sidways and I had to file a little on it to loosen it up. I think a dog may have bitten the zipper.