Flat Bottom Stirrups: An industry standard, our flat bottom stirrups are available in tread sizes of 2", 2.5", and 3". At the widest interior section, these traditional wooden stirrups measure 5 3/8" offering a very comfortable fit and ride. This traditional style of handcrafted stirrup consists of 7 layers of laminated wood, rounded over edges, richly stained leather treads, and sealed with a durable exterior finish. When selecting the proper tread with, please note that the tread width is determined by measuring the wood part at the bottom of the stirrup. The heavy leather treads that Don applies adds another 1/4" of total width.