I used a Stonehenge extra wide backing.
Once I had the four patch sewn I cut a 9 1/2” square of my background fabric and layered them right sides together and sewed a 1/4” seam around the outside perimeter.
Then I cut the block diagonally twice.
Then press open the four sections ( to the dark side) and end up with four HST blocks. Trim blocks, if needed, to 6 1/4" square.
Now the only down side to these blocks are they are all bias edges so you have to be very careful when sewing the blocks together that you don’t stretch them out of shape! When adding the border cut 6 1/4" strips WOF of the background and piece in the two corner blocks that extend the design into the border. DO NOT piece white and white HST in the border as that would put bias edges on the outside edge. I have had a few readers do this and that makes for a very unstable outside edge. So if you have a few charm packs sitting around and want make a fast and easy quilt why not give this a try! I used 3 charm packs and my quilt finished 63 3/4"x 69 1/2", that includes the 6 1/4" border. I used about 3m of background/border/binding fabric for this size.
