My English saddle is an 18 inch..it was a bit too big, I could have done OK with a 17 inch. I know the seat is the right size, I sat in a new model of the saddle I just bought with a 15-inch seat and the tack shop owner agreed with me and my mother that the seat was the right size...my friend even said the seat was the right size.
Smrobs, I just wanted to let you know...this saddle actually doesn't feel much different than my English saddle as for contact with the horse...it's very comfortable. He does kinda make me think of a Tennessee Walker, just the position in his gait. He is fairly smooth...trot can be bumpy! Canter is another story...just ask the barn roof how it likes getting pelted with dirt clods during the transition.
Thanks, everybody, for your response!!