Recently, I have seen alot of these types of signs around on Instagram and, of course, rather than buying a high price for it, I decided to make my own. For the sign I found of passage of scripture I wanted and created the document through PicMonkey.com but you can also do this through Word. Once the document was complete, I went to Staples.com and created 24"x36" engineer print (FYI they are awesome and very inexpensive!).
Once I picked up the print, I picked up a 1/4" 2'x4' piece of plywood from Lowes, along with a 1x3 board. The 1x3 board is used for the top and bottom frame and has about 1" overhang on each side!