Rulers are used to measure the exact length of objects and to draw straight lines from one point to another. They have marked lines that show distances in inches, centimetres and millimetres so that you can get accurate measurements. Rulers are helpful in various situations. For students, they can help draw straight lines, make charts and solve math problems. In professional settings like construction or tailoring, they are a useful measuring tool to see how pieces will fit or to mark where cuts need to be made.

For students learning about geometry, some important tools to have include rulers, protractors, triangles and compasses. There are math sets available that bundle these tools together. Protractors help measure angles in degrees, rulers help measure the length of a line and draw straight lines, compasses can help draw perfect circles and arcs, and triangles help you quickly draw specific angles.

A regular ruler is designed to measure the physical length of a line or object at a 1:1 ratio, which means if the ruler shows something as 10 centimetres, it is 10 centimetres in real life. A drafting scale is a specialized tool used by architects and engineers to shrink large real-world scales, like the size of a building, so they fit on a smaller piece of paper.

Measuring tools are important for arts and crafts because they help ensure accuracy and balance when working with different craft supplies, craft machines and craft kits. Measuring tools like rulers help take the guesswork out of sizing materials and spacing them out on a model, piece of paper or other art surface. Accurately measuring materials can help reduce waste and make your art projects look neat and professional.