Here's how you make them---
Select fabric and cork boards. I used boards with a slight raised edge on the back so I (my husband-he's been super sweet since I hurt my wrist) could staple the fabric easily to them.
Staple one side and make sure that the fabric is straight and following the pattern.
When you get to the edges, fold it over and staple the fabric to make a simple envelope edge.
Continue all the way around the cork board edges.
Repeat all of these steps on next board. Make sure that your fabric is even and lined up perfectly.
Next, measure the sides of the boards subtracting 1/2 inch from all corners. Decide how far apart you want your nail heads to be. I chose one inch. I was able to place 17 nail heads horizontally and 16 nail heads vertically on each side by using these measurements. I used a sewing ruler because of the notches and I could easily place the nail heads in each notch so that they were perfectly spaced.
Finished product--I then repeated all of the steps and made sure that the nail heads matched on each board.
Once I finished the boards, I trimmed the excess fabric and used a little fray stop around the edges. I then hung the boards with 3M photo hangers--one of the best inventions ever!!