SimFlex Expanding Sewing Gauge for Shirring, Smocking, Button, Eyes, Drapery Pleats, Dress Pleats & Much More. Gives you fast & accurate measuring. It has unlimited uses: great as a knitting Gauge, measure for bias or straight strips for quilting, even great for gardening (e.g. spacing seed rows) and cake decorating, etc. It is quick and easy to use. Simply lay it over your garment and expand it to the desired length for perfectly measured equal distances and accurate spacing from 3/8" to 3 3/8". Expands to a total of 24".