Size M: Wrist Circumference: Approx. 6.7 - 7.1 inches (17 - 18 cm), Logo Engraved, Crystal 0.6 inches (14 mm), Magnesite 0.4 inches (12 - 10 mm), Cut Glass 0.4 inches (10 mm), Rondell 0.3 inches (8 mm) *Due to the nature of the natural stones, there may be