When I showed a friend of mine the small Christmas-tree ornaments I made last month she challenged me to make even smaller books. So – I did. These books are 10×7 mm [0.39×0.28 inch], 15×10 mm [0.59×0.39 inch] and 20×14 mm [0.79×0.55 inch]. They have 3 signatures each and are fully functional as books. I made these 9 books into a pair of earrings and a bracelet and I gave them to her as a gift.