Bamboo Ruler, Bamboo Scale, 30cm, 3dm, with Grooves for Drawing Lines Found at my parents' house. From the 1950s, a school supply used by my siblings when they were elementary school students. It can be used as a ruler without any problems. With grooves for drawing lines, drawing parallel lines is easy. It could be useful for those collecting old stationery, or as an antique item for old folk houses. The name written on it has been sanded off (see photo 3). Please understand that this is a used item that has been stored at home for a long time before purchasing. Returns are not accepted.