Size S: Wrist Circumference: Approx. 6.3 - 6.7 inches (16 - 17 cm), Logo Engraving, Crystal 0.5 inches (12 mm), Rose Quartz/Chalcedony 0.4 inches (10.8 mm), Cut Glass 0.3 inches (8 mm), Rondell 0.2 inches (6 mm) *Due to the characteristics of natural stones, there may be slight scratches or chip