Each crane is folded out of a piece of foil origami paper about the size of a US postage stamp. I HAVE to use foil paper because regular paper doesn't hold up as well at this scale; Foil paper is thinner, creases sharper, and doesn't shred as bad. In this bottle, dunno how many there were when I took this pic, but now there are about 230 - 250. I'm going for 1000! Naturally.