Square Ruler

A square ruler, or an L-square ruler, is an essential for patternmaking.

When patternmaking you often need to form 90 degree angles when drafting blocks and patterns; having a ruler with two arms that form that 90 degree angle will ensure your right-angles are correct.

Example

Right Angles

When creating your own blocks, you need to ensure certain lines are at right angles.

The square ruler assists in doing this correctly.