I thought this origami crown was a great idea. It is a simple, glue-less way to make royal headgear for those play times when your child wants to play-act being a prince or princess. The size of the finished crown depends on the size of the square of paper used. A 26" x 26" (67 cm x 67 cm) square of paper produces a crown with a diameter of 7.87" (20 cm). Step by step instructions for folding the crown are located here.