Size S: Wrist Circumference: Approx. 6.3 inches (16 cm), Logo Engraving Onyx 0.5 inches (12 mm), Onyx 0.5 - 0.4 inches (12 - 10 mm), Cut Glass 0.4 inches (10 mm), Rondell 0.3 inches (8 mm) *Due to the nature of natural stones, there may be