From art to math, a Staples Acrylic Ruler is a must-have school supply you can use for every subject. This flexible ruler has both metric and imperial rulings for easy reference and conversion and a transparent design that allows you to see your place on the page. This acrylic ruler is flexible and scratch resistant so it can take being thrown in a backpack or hung in a study area by the hole on its end. This versatile school and office supply is backed by the 100% Staples Brand Satisfaction Guarantee.