Seat is 17" see pictures for gullet. Contact me if you need additional measurements or pictures. I love this saddle. It's very comfortable. Holds you in nice. Didn't fit my horses properly. Works well on wider back horses. Just replaced the small piece of leather under the front concho that hold the cinch up when not in use. Horn leather was repaired once before I owned it. Everything in operational use. Will except better offer depending on shipping location or local pickup.