Material: These dainty zirconia tennis bracelet are made of high quality alloy with cubic zircon,.lead-free & nickle-free, hypoallergenic for all skin types. .Adjustable Bracelet Fits All Wrist: The adjustable length is 5.7-11.3 inches,these tennis bracelets with a sliding round buckle and extension chains, .It is easy to adjust based on wrist size to get a good wearing experience,will not fall off easily.Youll effortlessly to put it on and take it off by yourself in a matter of seconds! .Best Gifts: Our tourmaline bracelet can be an excellent gift to women, girls, your best friend, your wife, mother, sister, daugther and even your grandma. .Suitable Occasions: Our opal bracelet are suitable for holiday parties,Valentines Day, Christmas Day, Mothers Day, holiday, ball, party, anniversary, prom, graduation, birthday or any special occasions.