Per Rivka... Great information however many members inquired as to where we got our boards. My Dh cut them on his table saw. When you do that you lose 1/8" due to the blade thickness. So unless you plan on cutting your coroplast with a razor blade you will not get 4- 12" pieces. The cost of my husband doing the labor was very minimal and we wanted to make this service available for those that had no other way of getting them.
Have a fun evening! & happy folding! :D