8880M were a weird one. Thin denim but cotton/lyocell mix. Usually lyocell blends run big but these actually ran quite slim and with the lyocell the thighs never had much give. Aside from that they were crackin jeans. So my advice, don't size down on these. But if my opinion counts for anything, I actually prefered the 880I wash. Stiff, 100% cotton and a more natural wash. They were awesome.