I got the first Buddy Belt for my youngest Doxie, Thunder, as he is so small (5.5 lbs) and I couldn’t find a good harness for him. I love that these harnessess come in such a wide variety of sizes. It fit him perfectly. I decided to get one for my other Doxie (Hercules, 16 lbs) as well as they are so lightweight. His Puppia worked well but with him being a long-hair and very poofy, I wanted to get the harness off is neck area more. It just arrived today and as soon as I switched to it, he was acting like the weight of the world had been lifted off him. These things work soooo well.