For reference, my Rescues are tagged 33, the waist measured 17.5" flat when new (~35"), and now fully stretched they measure just under 19" flat. I have a 35" waist but I wear these low and the top block fits well. Overall I like the way these fit but I'm pretty tall so I sometimes wish I had a bit extra in the rise and inseam.
Full measurements for the archives:
Rescue tagged 33 (actual measurements after 4 months constant wear)
Waist 19, front rise 12, back rise...