I bought this for my dog without checking the size, and it was too small. It's soft and cushioned, and it seems like the size can be adjusted, so it looks easy to use. I tore the bag when I opened it, so it's not included. I will send it in a different bag. Because the size is clearly too small, I haven't even tried it on my dog. I would be happy if someone could use it. I've included a size chart, so please refer to the M size section.