Make diamonds from strip pieced units. 3 templates in 1 (nested 3 sizes). Simply place the line on the template on the seam lines of the strip. Mark the fabric through drilled holes to aid in matching seams. Make a miniature version with the scraps. Watch the "Video" on how to use this template. Patterns sold separately (see below): Maddie Bea's #NBD13 and Saer-Bear's Quilt #NBD17 created with this ruler.