I bought a 1X4 board (where the width is actually 3.5"), and cut the blocks into 3.5" X 3.5" squares. Then I painted the squares front ant back. After they dried, I Mod Podged the image file (below) onto them.
The glue was still drying when I made them, so the edges are a little fuzzy.
Here is the picture file. I put them into a Word Document and had it printed on photo paper at Staples
If you have any questions, add a comment at the end.