I don't know if this is in reference quilting and embroidering. I was looking for this particular ruler and found it, it helps to put your embroidery design right in the middle and you can cut your square right away. Lets just be straight forward it is the best Fussy Cut Ruler. I got one as a gift for Me from Me. Here is the name of the site
www.CraftyBev.com
Be sure to check out the video to and I got the Big Sister 3 in 1 Fussy Cut, and I even got my name engraved,great for classed ruler is not ever leaving without me.
Johanna