Our necklaces are adjustable to ensure years of wear and are available in a single size. The necklaces' chain measures approximately 15.7 inches/40 cm and is accompanied by an additional three jump rings to allow adjustments over time. Jump rings are placed approximately at 11.8 inches/ 30 cm mark, 14.7 inches/ 37.5cm mark and the 15.7 inches 40 cm mark. To ensure the right fit use a ruler or the sizer provided below. Measure the distance from around the wrist beginning at the center of the wrist. Please contact Customer Care for questions or to request any custom sizes.