Rulers
One of the important stationary items in schools, offices and homes are the rulers. These rulers are made of steel or plastic. The main use of the ruler is to take the size of things like paper, desk or board. These rulers come in various sizes depending on the use. These rulers are mainly divided into grids that have millimetre or centimetre readings. A few of them are also divided in inches. The basic ones are 0-15 cm and the more scientific ones are above 50 cm. These rulers mostly contain conversion table so that you can take reading in desired format.