I’ve been using the made well harnesses for my small Shih Tzus since 2018. I love that they’re adjustable, so not only did they work as an XS from the jump for a puppy, but we’re still using the same XS harness now that one is full grown. We started right away using the XS fully tightened for our new puppy and it works great. We have all of the colors and love them!