This bracelet is made of 100% nickel-free surgical stainless steel. There is a red medical symbol placed prominently on the front of the bracelet. The front opens to reveal a small compartment. The expansion band is 7 ½”, at rest, and the length is adjustable. The engraving plate is ½” high by 1 3/4” wide. It is engravable on both sides. The front can hold a maximum of 48 characters and the back can hold a maximum of 48 characters for a total of 96 characters, front and back.