Size L: Wrist Circumference: Approx. 7.1 - 7.5 inches (18 - 19 cm), Logo Engraved, Crystal 0.5 inches (12 mm), Chalcedony 0.4 inches (10.8 mm), Cut Glass 0.3 inches (8 mm), Rondell 0.3 inches (8 mm), Due to the characteristics of natural stones, there may be slight scratches or chips.