Absolutely LOVE this harness for its durability and craftsmanship! It’s very well-made and a great harness for its surprisingly low cost! However, I selected a large size based on the sizing chart, which would have put my pup’s measurement in the middle of the large size range. While I could adjust the straps to be comfortably secured and tight around his body, the body area of the harness was still to large, so no amount of tightening the straps would do any good, and would only become too tight. I should have purchased a medium, and selected a size that put him at the top of the sizing window. After all, it’s a great price, so I can get another once he grows out of it! Just bummed now that I can’t use this one.