I don't know how it happened, but somehow my favorite pair of jeans ended up with a hole in the crotch, so I couldn't wear them anymore.
the tutorial written by mimi g. The tutorial is awesome and so easy to follow an understand, there's even a video.
The only thing I would suggest... see... I used a pair of jeans that were a little snug on me as the base and now the skirt is a little snug on my backside, so I suggest using jeans that still fit you.
I have another pair of jeans, ones that are too big and I'm going to try with those and fabric this time, see how it turns out. We'll see.