I have been looking, for a couple of years, to find a modest jean pencil skirt. Whenever I find one I like it is too expense. I just found one online by JCrew for $98. WOW! I have decided that I can just make my own with an old pair of jeans I have! (This would be perfect for those jeans that you love that have shrunk in the length or that have frayed hems where they drag slightly on the ground.)
Begin by cutting 12” off the length of your jeans.
This gave me several inches to work with when it came to hemming the bottom.