How fast does the majority of stretching the waistband occur? I've had my new 26's on for a few hours now, and there's definitely a lot of room. Seems to have gained about 3/4", unless I wasn't paying much attention to it when I first put them on. I'm a 28" waist so I thought sizing down 2 would be fine. Also, if I sized down anymore I probably couldn't get my thigh into it. These aren't going to be unable to stay up on my waist in a month are they? I also don't like the look or feel of really skinny jeans, but I'd like to not have too much extra fabric in the waistband. Thanks! EDIT: I just measured them and they've stretched to 30".