These sleek styles are crafted from 100% neoprene and feature a comfortable Spandex lining that adds extra softness and stretch. Complete with two Power Balance holograms, the neoprene wristband is a perfect fit for any of the day's activities. S (6.1 in or 15.5 cm), M (6.7 in or 17 cm), L (7.3 in or 18.5 cm) and XL (7.9 in or 20 cm)