to make HST, I cut 2 squares about an 1/8 inch larger than the pattern calls for, draw diagonally line, sew 1/4 in on each side of line, cut on draw line. You will have 2 HST. BUT before you press open, I use Quilt in a Day HST square up ruler, after trimming to correct size, then press open. This ruler is for HST from 1 1/2 in. to 6 1/2 in.