Not only does this hypoallergenic bracelet have a kid-friendly design, it may also help keep your child safe! The bracelet stretches to best fit wrists the same size as, or 1/4 inch smaller than, its advertised length. The lack of a clasp means that it cannot fall off by accident! One medical symbol button (removable, if you wish) comes included. Up to four additional allergy buttons will fit the bracelet, which are available for purchase separately. To attach a button, stretch the bracelet where a hole is located and insert the back of the button through the widened hole.