Jeans usually outlast our use for them since styles and sizes change before they have a chance to wear out but they still have a lot of life left in them. Here are plenty of crafty and clever ways you can re-use the material and make them into something useful (all free tutorials and patterns). Enjoy!
Bibs : So lovely and so easy to wash!
Quilt Project : Finished size measures approximately 63″ x 84″, you’ll need about 12 pairs of jeans to make this. Also see this Fray Edge Quilt , this tutorial  and more quilt patterns here .
Jeans Apron : Made with a pant leg from an old pair of jeans, bias tape binding and twill tape.
Booty Bag Tutorial : Made with the “seat” of an old pair of jeans (potential for lots of room depending on the size of the pants!).
Wall Hanging : The back pockets make a cute place to stash crafty stuff.
Coasters : The thick hems and seams are cut from old jeans then rolled tightly and glued together.
Denim Pouf : Tough, sturdy and nice! Made with assorted scraps of denim in different shades and packed with pillow stuffing.
Christmas Trees : Made with scraps of denim, colorful buttons and bits of decorative ribbon.
You can make a Microwaveable Heat Bag  with denim pieces in any size you like. Also check out the Scrap Happy List , plenty of projects in there that would be great made up in scraps of denim.
Props to WiseBread’s post 25 Things To Do With Old Jeans  that inspired this article as a feature way back in the summer of 2008.