Non-slip with black markings. Compass point in the center of the ruler for cutting and marking right angles. This makes those mitered corners much easier! Measurements are clear on dark & light fabrics. Easy to read numbers and grid lines. 1in grid with 1/2in, 1/4in, and 1/8in increments.
Adele's Tips: This is the best ruler for mitered corners. With the angles marked in the center and radiating off on both sides you can "square" the ruler to the corner.