I'm in the same boat. But my local shelter runs a clothing closet free to the public every week, so I pick up clothes every week. When some get too dirty, since I don't have a way to wash clothes other than a bathtub...I have to throw them out. But the mission has nearly new clothes from hollister, a&e, etc. That place is a lifesaver. Maybe your area has similar programs? I'd suggest to call your local homeless shelters. No, you're not homeless. But the shelters know of all the local resources and would be happy to point you in the right direction.
I have plenty of clothes that I got from the clothing closet that don't fit me cause there's nowhere to try them on there. I just don't have money to ship. If I could figure out a way to ship, I would man. I wear your size jeans too and I have tons of them.