I wear a 2X in women’s, and I got a size 4. I am 20 weeks pregnant and I have a rather large chest and butt. My belly hangs low, and these bands just roll from both ends. They’re fairly tight which is what I wanted, for support of round ligament pain. But I am highly disappointed. It rolls up in the back near my butt no matter how far I pull it up my back. It also rolls down from the top no matter how I have it. I’ve tried tucking the top of it under my bra strap. I’ve tried the sticky end on both top and bottom, and I keep having the same issue. It’s the same issue I have with every kind of shape wear in existence. The rolling.I can see this would be perfect for use during pregnancy. I purchased it for post hernia surgery. It’s definitely long, which would be perfect for a baby bump. For me, it’s too long. I’m 5’ 3”, 150. I purchase a size 3 so it wouldn’t be too tight on my incisions.This is very snug. It’s a tight fit if you have a bigger pregnant bellyI used this a couple times and it was okay, until it wasn’t! It stopped working so well when my belly got huge and I broke down and bought two pairs of maternity pants and really, there’s no comparison with comfort. Maybe if your bump stays smaller for longer this product might work, but I honestly just felt like I had too many layers on and had buttons and zippers poking into me. Unless you’re really early on, just get the maternity pants.I work in a dental office and I wear these under my scrubs.. I love them so much there’s such a huge difference from when I wear them and when I don’t… it does reduce back pain but doesn’t completely eliminate it.I also love that it provides coverage for when I stretch or anything while workingI have carried low all pregnancy and been generally uncomfortable late in the second and into the third trimester. My OB recommended these bands are it’s helped immensely for support and being able to wear dresses while being very pregnant in July/August. The elastic band is nice for keeping these in place and not rolling up and out of place.This was actually a gift to my daughter. She loves them and is able to wear her "regular" clothes because of these belly bands.I bought these to give my belly a little better shape and they did perfect. I would order a size up if you don’t want it tight but it’s perfect if you don’t need shapewear but just to help round your belly at the bottom.