I ordered a unisex size medium, I’m 5’7” 180 lbs. I took a gamble on the medium since it was the only size in stock in the color I wanted - and it fits me perfectly! I have a more narrow waist with thicker thighs/booty, so it’s just ever so slightly snug on my hips, but in no way uncomfortable (and that’s after washing/drying with a little shrinkage). Absolutely perfect size for what I wanted. If I sized up to a large the crotch would have been way too low - the medium is more flattering and lets it “sit” right on my hips instead of being too baggy. I can lounge all day in this thing, it’s like wearing a head to toe sweatshirt. Only bummer is the hood is thinner material and seems a little too small, so it’s not really cute or comfy with the hood up, but everything else is perfect so I absolutely love it. And no, I wasn’t paid to say any of this (I wish).Love this one! I’m 5’5”, 150 lbs and ordered the large. The fit is interesting because the upper body through the arms and to my butt is perfect. I didn’t want it to ride up my backend (thanks bubble-butt) like many do, and the large is a perfect fit to not ride up or show any crack-crease. So a medium might be too small to be a lounging type one. However, the legs are LONG. If I was 5 inches taller, the legs would be “perfect”- but I like the longer legs because when I sit or sit with my knees to my chest, it means the legs don’t ride up and become too short. The crotch hangs looooow, I don’t know how long my torso needs to be to fill that space up, but my husband said it’s a “cute” look. If you’re looking for one to see other people in, I’d get your normal size. I normally wear medium in most stuff. Anyways- awesome onesie! Great pockets, although the zipper ones hang low because how long the legs are, but they zip so all my stuff can be safe as it swings around when I zoom through the house. The hood is perfect! No strings is a plus! Just really well made! 10/10!This onesie is comfortable and easy to get in and out of. The fleece is extra warm and keeps me from having to turn my heater on early in the winter season. I love the double pockets, I use the lower pockets to carry things because they zip closed, and find the upper pockets perfect for my hands when I am relaxing watching tv. The only downfall is the crotch, it is set somewhat low on me but the same as pictured. If you sweat from the nether region easily you might want to wear shorts under it or you will have swamp crotch. Also due to the crotch being low, it is hard to move around with ease without hearing a tearing sound. They are not elastic in any way to allow any splits action. All in all, they are perfect loungewear and I even wore them to grab pizza once and was stopped and asked where I got them by an old man. LOLI got what I came for and more in most respects EXCEPT the color. I went for this one because the color looked like my favorite magenta-purple, but on arrival is was a more muted shade. Oh well. It was much more comfortable and wearable than expected. If I didn't know that it would be a bad idea, I'd buy 8 of em and wear them every day of the week.It fit way too small and had no give in the material. Poor quality as the zipper broke on the 2nd wear. Disappointing.I bought myself this snuggly warm onesie pajama set for Christmas it was even better than I expected. I'm a small-sized girl but I'm tall and usually I have a hard time finding things that are long enough on my legs arms and torso. I would wear a size small but usually by a medium for the extra length. I bought a medium in this onesie end the sleeves not only reach my wrists but they could cover my hands in bottoms not only reach my ankles... They could probably fully cover my feet. They almost could be dropped crotch pajamas like back in the MC Hammer days. I love them and they're super warm and snuggly and I would buy them again but I think I would try a small size. I don't necessarily mind the bigger bagger size mediums that I have but I would like to see if the fit was even better with the smaller size.I’m impressed the Small fits me so well. I’m 5’9” ~130 lbs, wanted a snugger fit to wear to music festivals. It’s just long enough to fit great! When I pull the hood on it’s a bit tight, but honestly it’s the length that matters, and all are long enough.The blue isn’t nearly as bright as the photo portrays, which isn’t a problem. It’s just more of a navy blue.THIS ONE PIECE PAJAMA IS AWESOME! I wear this probably too often. It feels like I’m wearing a comfy sweatshirt on my entire body. The four pockets are useful, the drop crotch makes things comfortable. The double zipper is fun! I like that if I need to run to the store while wearing it...it almost looks like an outfit and I can get away with it. (I purchased the stars and stripes design.) I talked two of my friends into buying one and they both love their choices too!I am 5’5” 130 lbs and purchased a medium.