So, the name of the
game here is alignment. And believe it or not, those
printed dieline templates you’re going to use to cut out your fabric
are also going to be the key to getting this perfectly aligned.
So, start with one of your templates. You’ll want to trim the side
that’s going up against the zipper right to the edge of the dieline.
Then, place that edge right up along the edge of the zipper, like shown.
I know, it’s going to seem too close to the zipper, but there’s a 1/4
inch seam allowance built into the design. So it’s all cool. Only the
fabric will get the close to the edge, not the stitches.