I just love how you used the pocket to make a pocket on the outside, too!
Okay, since I totally want to steal this idea, I just want to make sure I get what you did...
You cut the pocket part off of the pants with a little extra for the seam allowance. Then, you cut your interior fabric and sewed on the elastic. Then, you stitched the interior to the exterior and turned it right side out. Then, you put in the zipper. Is that about right? Because I have a pair of cargo pants that I've never gotten around to hemming. And, now they don't fit. So...pencil/pen/brush cases for the family this Christmas...definitely!
Thank you so much for posting this!