My pre-pregnancy Old Navy size was XS/S and my hips are still the same width now at 19 weeks, but my belly has been growing a lot (+7 inches already). I was iffy on these leggings at first, because they seemed a bit tight on the legs/hips, and the material not soft and thinner than expected, but I... figured maybe the tightness would be good for holding everything in place during exercise. Now, I have worn them a few times, and somehow despite being tight, they are constantly sliding down my body. Even when not exercising, I keep finding the crotch 1+ inches below my actual crotch and have to hike them up. When I went for a run in them, I had to keep yanking them up by the belly and the crotch. I feel like this item is simultaneously too small/tight, but also somehow too big? I would recommend sizing up if you're on the fence about your growth. I'm not sure I'll fit into these comfortably in my belly in another few weeks. I have recommended old navy workout gear to so many people as excellent despite the lower prices, but 90% of the maternity wear I've gotten has been a miss in sizing or quality.