Unfold the bottom hem and start to remove the stitching from the side seam of the skirt with your seam ripper. Cut a little bit of the seam thread to show a small portion of your leg, or go higher to show a bit more. You may want to try on the skirt after loosening a few inches to see if you have opened the seam as high as you'd like.
After you have opened the side seam, fold back the edges.
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