I just made Noah a pocket fitted out of an old army shirt from my dad. I love recycled fabrics, too, I make everyone give old t-shirts and stuff to me to make diapers instead of giving them to Goodwill

I do my elastic really easy- all I do is sew down the ends and then sew a casing around it (I T&T all my dipes). To figure out how much I need, I just lay the diaper out, hold the elastic where I want it to start, stretch it to where I want it to stop, put my finger there to mark the spot, and cut

Then I just cut an identical piece for the other leg. It's really very easy. I never knew how to sew, and taught myself, and I think it's a lot easier to just sew down the ends than it is to sew the whole thing in.
ETA- this link:
http://www.diapersewing.com/hbpocketinstructions.htm
It shows the way I do my elastic. This site was really helpful to me when I was first learning how to sew diapers, b/c it has step-by-step pictures for everything
