I'm Happy to take more pictures and answer questions. I called Bob's about this saddle and they would say the seat is a 15 1/2" built on a 16" tree.
I found that it rides much larger than the average! # stamped on saddle B 95 138 M. D L Tree with Arizona Bars. Fenders are longer than standard.
The item "Bobs Custom Western Saddle Randy Paul Reiner 16 Tree with xtra long fenders" is in sale since Sunday, December 20, 2020. This item is in the category "Sporting Goods\Outdoor Sports\Equestrian\Western Saddles & Tack\Saddles". The seller is "horsesnameplates" and is located in Ramona, California. This item can be shipped worldwide.