* Material: made of good quality stainless steel with an anodized coating, durable, reusable, rust-proof and not easy to fade. Colors will vary. * Size: the outer diameter of massage ring is about 2.5 cm/ 0.98 inch, inner diameter is about 1.2 cm/ 0.47 inch, fits for most people * Function: these massaging rings can reduce anxiety, relieve stress, can promote the blood circulation of the finger in a certain extent, very suitable for students, office workers, etc. * Range of usages: acupressure rings are suitable for adults, teachers, students, therapists, long-term computer users; Especially beneficial for restless individuals who want to relieve stress * Easy to use: put the massage ring on the finger, scroll up and down, then the finger will produce pressure, so as to give the finger massage purpose. * Random colors will be chosen for your order.