I bought this saddle in 2011 directly from Thornhill at Equine Affaire. I clean and oil it regularly to ensure the quality of the leather. I also store it in a secure and dry tack room fully covered with a thick saddle cover.It is stamped as a 17.5" with a medium tree. This saddle fits on every horse I've put it on in the barn. The only reason I'm selling this wonderful saddle is because I have grown out of it. It needs to go before the upcoming show season! It retails for over $1200, so me offering it for only $700 is a huge steal. I can ride in it for hours without being sore or uncomfortable. Feel free to email me with any questions!