Seams Right! Multipurpose tool for sewing, quilting knitting, crochet and embroidery. Use for measuring & checking fabric and yarns! This handy tool is easier to use than a regular ruler. Developed by Nancy Zieman, it has many common and not-so-common measurements. You can: Accurately measure seam allowances. Precisely measure buttonholes and buttons of 1/4″ up to 1″. Quickly measure common increments of 1/4″, 3/8″, 1/2″, 5/8″, 3/4″, 7/8″, 1″, and 1-1/2″ .