This saddle is a used Niedersuss Symphonic Sattelmeister that is in good condition. The Seat is 17.5" and the tree is M. This much-loved saddle is the classic Niedersuss favored by the Dutch and Austrian teams, as well as the Spanish Riding School. A very forgiving fit for a wide variety of horses. Please consult your local saddle fitter regarding this saddle. Please e-mail firstname.lastname@example.org for more information. Thank you for your interest!