What a wonderful idea this is! I was trail riding with my friend and she had one of these seat savers. Her horse was acting up so we traded horses on the way back and I got to sit in her saddle with this seat saver and what a difference! I just had to get one. So I have been trying to get these for a month now and everyone was out of them! I finally got them in.
It measures 19" long and 12" wide. It's about 1" thick with nice white synthetic fleece underneath and a brown heavy cotton material on the top side. Completly washable! Great for protecting your saddle too! There is elastic on one end that goes over the horn and elastic on the other end that goes over the cantle. I tried it on my western saddle and it works great.