Omnigrid 1.5" x 12" Ruler is non-slip, making it perfect for cutting strips, shapes and bias pieces. It has 1" grids marked in 0.125", 0.25" and 0.5" increments and 45 degree angles in fluorescent chartreuse to stand out against light and dark fabrics. It is ideal for centering inch measurements and marking 0.125" and 0.25" seam allowances.