Made of by 100% silicone rubber - latex and toxin free. The wristband circumference is 210mm/8.3inch, and the diameter is 12mm/0.47inch, proper elasticity makes them suitable for most people and convenient to put on and take off. If you need other size, you can contact us to custom the wristbands.These silicone wristbands are available in a variety of vibrant colors, perfect for diverse group activities such as parties, banquet, dinner, training sessions, events, birthday party, wedding, family gathering, carnivals, music festive and sports. We can also customized color as per PMS#. We can do debossed, embossed, debossed color filled, CMYK printed logo.