I would try to keep it with the standard paper size. If you have a scanner, just scan your drawing and print the number of copies you require. I haven't been to a copy store in along time so I am not sure if there is any paper that will print 12.5" unfinished block. If so, it will be much more expensive. This is when Electric Quilt comes in real handy. If you are not able to get this drawn, send me a PM and I will draw it on EQ. All I will need to know is the size of you center square and the finish sizes of your strips.