The original Morrison Open Roller designed by Dr. Scott Morrison of Rood & Riddle Equine Hospital in Lexington, KY. Dr. Morrison prescribes this shoe for horses with arthritic form of navicular, chronic heel pain or low grade founder. The design of the shoe helps relieve stress on the hoof capsule. OPENROLLER #11MORRISON Morrison Open Rollers SIZE: 5 = 4-1/2 W x 4-7/8 L SIZE: 6 = 4-3/4 W x 5-1/8 L SIZE: 7 = 5 W x 5-7/16 L SIZE: 8 = 5-1/4 W x 5-11/16 L SIZE: 9 = 5-1/2 W x 6 L **FIA INCHES** 13-1/4 14 14-11/16 15-7/16 16-3/16