~Waterproof Stretch Silicone Sport Fitness Safety ID Bracelets come in two main sizes: large, medium (6 LINES OF ENGRAVING (3 ON FRONT AND 3 ON BACK WITH 40 CHARACTERS PER LINE) ~The large bands are 8 3/8" in length and will fit most adults and large-framed teenagers. ~The medium bands are 7 3/8" in length and generally fit ages 11 and up, including most teenagers and average women ~All Classic-style bands are .08" thick and 1/2" wide. ~FREE ENGRAVING DIRECTLY ON SILICONE. NO STAINLESS STEEL PLATE OR CLASPS NEEDED. SIMPLY STRETCH AND WEAR!!! ~Our 1/2 inch Waterproof In Case of Emergency Stretch Skinny Sport Fitness Safety ID bracelet comes with a message of every type. Our silicone wristbands are made with 100% Hypo-allergenic silicone. This ensures that they will not break or tear easily and can be worn for months or years with little to no wear. It is designed to be light weight and NO bulky ID plate or clasp. The Band itself allows for 3 lines of FREE personalized engraving on the Front and 3 lines of engraving on the back with your choice of up to 40 characters per line. To install simply stretch the bracelet and slide on or off your wrist. This Skinny Sport ID Bracelet is high-quality, lightweight, and comfortable feel making it one of our best sellers at an affordable price.