I have not made one of these in a long time. I spent some time this weekend (30 minutes) to create this bag.
My friend gave me a pair of her jeans and I repurposed it into a bag to take to my crochet group on Wednesdays.
I cut off the legs
Turned inside out and sewed 1/4" across the bottom
Boxed the corners at 2"
cut strips of jeans (2") (2 pieces) out of one of the legs and sewed the strips to the top of the waistband.
Added a 2" corresponding fabric for a fashionable belt/bag scarf.
I still have plenty left over to make smaller bags; here is one, I just need to put a snap on it.