Now in Pony size, the Soft Grip rein from Nunn Finer gives you great grip without the bulk of a standard rubber rein. Rubber covered nylon is super flexible and strong. With its superior bridle leather and top quality buckle ends, they've quickly become the most popular reins in our store - once you touch them, you'll know why! 5/8" inch. Pony size length. Havana (with brown rubber).