It's Academic puts a fun twist on ordinary classroom products. Why stick with a regular, wooden or standard ruler when you can have fun with numbers by using the colorful Flexi Ruler! The fun doesn't stop there — these plastic, flexible rulers are best to use for both 12 inches and 30 cms with easy to read and accurate measurements. With a choice of your favorite color from blue to green to pink, you can't go mathematically wrong with this ruler! If you're looking for rulers in bulk to supply your class or students with, these Flexi Rulers are perfect for school supplies. They come in a 12 pack so there are plenty of rulers to be passed around! You'll never have to worry about looking around for extra rulers during a classroom lesson again.