The saddle has an 18 1/2 " seat. It puts the rider in the correct position and it is very comfortable. The saddle is designed to allow shoulder freedom for the horse like the best Hennigs and Schleese saddles. This tree is currently set to wide and is not adjustable. It is very well made and in excellent condition. It was made by Colonial Saddler Co.and is an American quality product. Colonial saddler is owned and its products handmade by the Certified Saddlemaker Renna Van Dooren.; Please look at his biography on the internet. Original cost was in excess of $3,000.00.It is a bargain for this price. I no longer have a horse to fit it. Worry free buying. Try it for 7 days. Send me a tracing. and I will see if it looks like it could work.I will then send it for trial. Returns accepted.Good luck to all and thank you for looking.