These origami sheets are actually extremely thin sheets of mylar. The mylar is laser etched to give a three dimensional, multi color, holographic ball pattern. This incredible sheet reflects light in all different colors, and the pattern has an optical illusion effect- it actually seems to move, depending on how you look at it! There are five sheets- two silver, one gold, one pink, and one green. All of the sheets are double sided; with silver on the opposite side. 5-15/16 inch square. A fantastic sheet for making folded origami, collage, scrapbooking, book making, gift tags, book marks... the uses are endless!