Stübben Dynamic Dressage spurs with rowel. Neck size: 35 mm. Benefits Dynamic Spurs: • Elegant design • Better fit for narrow-heeled riding boots because of the special v-shaped heel design • More comfortable fit due to offset loops • Made of flexible stainless steel that allows the user to form the spur to each individual’s size, need and comfort. • Because of their flexibility Dynamic spurs fit both men and women.