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Mark along the waistband, half of how much you need to take it. My full amount was 2 1/2″ so my mark is 1 1/4″ in.Make sure you sort of follow the curve at the bottom so there will still be room to move in the pants.
Lay it flat and pin along the marked line.
Sew on the marked line.Unpick the previous seam.This is what it should look like when it’s opened.Cut the seam allowance down to be 1 1/2″ to 2″.Make sure that you tuck in the top corners when you iron so that the corners won’t show when the waistband is closed.To close the waistband, stitch in the ditch about four inches across over the back seam. I don’t have a good picture of myself doing this. Sorry!