5. Buy longer zippers A good choice is at least 1 in. longer than the pattern suggests. Stitch both waistbands and neck facings right across the top of the zipper tape (use nylon zippers), cutting off the excess at the top. This eliminates that annoying gap between the top of a zipper and the waistband (many fly-front pants deal with the problem this way, so why not skirts?), as well as the need to sew a hook and eye to the top of a dress zipper.