Allergy Alert wristbands are bright, colorful, fun and designed to be noticed. Each features a unique AllerMates character and raised, bold lettering indicating a specific allergy. Wristbands can be stacked for multiple allergies, too. They come with three adjustable snaps to fit most kids from 2 years old and up, including many adult wrists. They"re hypo-allergenic, latex-free, nickel-free and waterproof, and our products meet or exceed all US and European safety standards. Each band measures approximately 7" long.