Size M: Wrist Circumference: Approx. 6.7 - 7.1 inches (17 - 18 cm); Logo Engraving: Crystal 0.5 inches (12 mm); Pink Agate 0.4 inches (10.8 mm); Cut Glass 0.3 inches (8 mm); Rondell 0.3 inches (8 mm); *Due to the nature of the natural stone, there may be slight scratches or chips.