4"x 36" lip edge ruler. Works like a T-square.Features the patented rolled edge which acts as a T-square against the edge of a cutting mat, and eliminates ruler slippage. This size is ideal for quilt borders and home dec projects. Includes mini-gridmarkings. First 5" is a detailed mini-ruler. Perpendicular lines added for convenience. Improved lip edge. Enhanced gridding for convenience and accuracy. Two 45 degree biased lines and two 60 degree biased lines.