place the straight cut pieces on the bottom with the pinked edge pieces on top- with the pinked points just barely (a thread or two shy) of the edge of the straight edge- then use the straight edge to line up your 1/4"
pinked edges are nice sometimes with pre-cuts because they are not so apt to fray- just takes a little (getting used to) but using straight cuts with them really makes it quite easy once you learn how
