It is a baby height chart. I picked up the idea from this post. The link to the tutorial had been broken. Anyway, here are some pictures of my version. There is a wonk to it and my first attempt at machine binding did not go well. Now the whole world sees my mis-mitered corners. The back though looks fantastic! I used the Frixon pens for the straight lines at inch increments and really like them. I would make this again. . . now that I've done it once.