Choose a pair of jeans that fit your waist and hips well
Try the jeans on and mark the desired skirt length
Cut off both legs at the marked length
Unpick the inseam from the crotch down to the hem on both legs
Open the front and back center seams enough to flatten the fabric
Lay the jeans flat and arrange the opened leg panels into a skirt shape
Pin the front and back panels together to fill the center opening
Sew the panels in place along the opened seams
Trim any excess fabric from the inserted panels
Finish the raw edges with a zigzag stitch, serger, or hem tape
Hem the bottom edge to the desired length
Topstitch the seams for a neat finish
Press the skirt with an iron
Add a slit, distressing, or extra panels if desired