After you cut off the 1/2 inch from your paper, this is the important part, take your ruler and measure on one side of the paper, in 1 inch on both sides. Then take your straight edge or cutter, put the 1st 1 inch mark at the bottom lined up, now move your top over until the top edge is along the straight edge too, then cut. you will end up with a piece like this \ or like / depending on which end you are cutting. Do this on the other side. Hope this helps??
Lisa C., Mom to 4 great kids, 19,17,11 and 10!