This bookmark has a stainless steel laser engraved charm with “Have a piece of Pi” on it where Pi is shown as the Greek Letter. It can be used as a bookmark, page marker, or planner book mark. The bookmark measures approx. 3 1/2 Inches in length. The charm measures approx. 3/4 inch across. This item contains small pieces and is not intended for children under the age of 14.