Ok, company came by so now I'm back with your template for those of you who would like to try it.
Take you ruler and lay it on a sheet of paper, line up the right side and the bottom of the paper with the ruler to measure a square of 4 and 3/4 by 4 inches.
Now draw the square in with a mechanical pencil (fine point). While the ruler is in place, mark a dot or line (is better) 2 and 1/4 inch from the left side. What is left is 1 and 3/4 ins on the right side which equals the 4 inches of the square right?
Now from the right side down from the line, measure 2 inches down and make a dot or line.
Line up the dot at the top of the square to the one down the right side and draw a line.
Line up the same dot at the top with the bottom of the left side and draw a line. This is the template... Cut out and glue to template plastic. The 1/4 ins seam allowance is include.