If you are skilled at sewing, you can make this narrower if you like, but be sure to adjust the length you cut the skirt accordingly. Now, sit in a comfortable chair. Pin into place. You'll find that the stitching line provides a natural point for the fabric to turn under the way you want it, and even a curved raw edge can be tucked neatly under. After pinning the hem up, machine-stitch it into place.
Some people like to turn the hem toward the right side instead of the wrong side.
Then they cover it with sequins or other trim. That way, no hem shows at all on either side.