15” R-R, I bought it last year and the horse I bought it for is now a brood mare. This saddle is the most comfortable saddle I’ve ridden it, it hold you in very well allwhile letting you still move. I love this saddle, it’s beautiful, I just don’t ride enough anymore to have this saddle! Willing to ship at buyers expense. It’s in Montana right now but It can be in northwest Washington later next week! Pm me for price and more info!