Try making one today by watching the video tutorial below.
If your fabric has excess, trim it down and double-check that the final size is 5.5 x 10.5.
Next, take your ruler and mark the fabric at 5 & 1/4.

Image credits: Erica Arndt via Youtube
Finger press it open, then run some stitches down to the second scrap as well.
Keep adding scraps in that same manner as you go.
Now, trim up your project from excess fabric.

Next, take it to the sewing machine and start on one of your longer edges.
Star sewing your binding down using 1/4.
Sew in this manner, repeating the process on all four corners.
