The TRUECUT 12.5 x 12.5 in square quilting ruler helps measure and square blocks for quilting, sewing layout, and pattern work when working with rotary cutting. It includes TRUECUT Ruler Track, 1/8 in increments, and built-in marking openings so you can mark through the ruler as you work. Pair it with TRUECUT cutter guides to help keep rotary cutters aligned and reduce slipping along the edge during long cuts.