Type: Bracelet Item No.:PPS1 Material: Copper Treatment process: electroplating Circumference size: 18cm, 20cm, 22cm Style: Unisex style: retro/simple Package contains: 1 bracelet Tips: Please accurately measure the circumference of your wrist and choose a comfortable size. You can use a thin thread with no elasticity to circle around the place where you wear the bracelet on your wrist, and mark the intersection of the with a thin pen, and then stretch the straight, use a ruler to measure the distance between the two marked points, this is the value of your wrist circumference, then choose a bracelet size slightly larger than this value