While it seemed to suit me perfectly for my mermaid endeavors at the beach, it's a fun and comfortable skirt to wear out in general - best of all, it only took me a few hours on my serger!
If you don't have a serger, you can still make this with a regular sewing machine. I would recommend a zig-zag stitch for the seams and your choice for the gathers. (My usual method is here, but I think this new way looks fun to try!)
2-3 yards of stretchy jersey fabric - more if you're a larger size or want to line it
serger or sewing machine (or needle and thread!)
1. Measure your waist and subtract 1.5 inches - it's jersey so you'll want negative ease. Cut out 2 long, rectangular pieces with this new measurement in length and 4.5" in width. (For example, someone with a 28" waist will cut out 2 rectangles that measures 26.5" x 4.5")
2. With right sides together, serge one of the long edges together. Turn and press. With RST, serge the two ends together with a half inch seam allowance to create the waist band.
3. Using the below picture as a guide, cut out your main pieces for the front and back sections of the skirt. The widest part of the skirt should be 1.5" less than your hip measurement. Using your waistband as a guide, grade the top of the skirt until it reaches your hip measurement - because jersey is stretchy, you don't need accurate measurements here. From the top to the side hem (not including the waistband), I have 16" and you can see the adjustments for the front and back piece. With the adjustments for the front piece, the center measures (not including the waistband) 14" in length. The center back (not including the waistband) measures 18" in length.
4. Sew the two sides together with a half inch seam allowance. Attach the waistband.
5. Measure around the bottom of your skirt to find the ruffle length and multiple that by 3.19. For example, if your bottom hem measures 48" all around, cut out strips for your ruffle at approximately 153" in length, with 4.5" in width. I like to ruffle on my serger - though if you prefer to gather by sewing machine you may. Gather until have the proper length of your ruffle.
6. Pin your ruffle into place and serge the ruffle onto the bottom of your skirt with a half inch seam allowance. You can finish the seams if you want, but jersey doesn't unravel so I left mine unfinished.