I'm always a bit wary of one size fits all - I'm pretty skinny (size 2-4 usually) and have problems with the ...
340272
These actually fit me! I'm always a bit wary of one size fits all - I'm pretty skinny (size 2-4 usually) and have problems with the waist being too big with lots of pants. These fit fine though! The only thing I'd change is make them a little thicker, since there's definitely a visible panty line with these. They're extremely soft and are super comfy, so I'm sure I'll wear them a lot!

Edit 6/18/17:
I've worn these at least once a week and they've helped up pretty well, although I did just notice a small partial tear. Considering the price and the amount of times I've worn these, they're still worth the price. Much better than the thin leggings I've bought at the mall. I even bought a second pair!
4489232
I should have known that a "one size fits all" item would be a bit awkward to wear.  I really liked the pattern and needed something in a hurry for a recent trip to Florida, so I ordered this item as it qualified for Prime.  The material was cheap and thin, but that was actually not an issue as I was only wearing it on quick trips to the pool in very hot weather.  The fit of the garment was odd, however.  It has an elastic panel in the front, beneath the bust, but the fabric around this elastic panel is quite tight - not roomy. (I am 5'5", average build, a bit busty, not skinny but not overweight) I was surprised that a "one size" item was so snug on top.  The length was also a bit shorter than I would have preferred.  It was wearable over a bathing suit but not outside the pool area, as it doesn't fully cover the backside.
4858926
I'm barely a 32c, slender upper body, and this was too big on me. The shoulder straps were too long and the overall fit of it was ever so slightly baggy. Not really what I was looking for! Anyways, it wasn't a fit for me but there wasn't anything wrong with the item which is why I give it 4 stars. I guess I just don't fit a "any size" but I'm sure it would work just fine for others. If it fit I would have liked the style. I wonder if the size differs between the colors, as it seems everyone has different experiences with this item, but I would say the navy is one of the bigger ones.
1435475
Got the XL size. I'm somewhere around 5'4 and weigh like 110 or 120. I'm quite skinny. Thankfully this fits me perfectly fine. It looks nice too!
1223739
I'm usually weary of one size because I'm a plus size girl but I was pleasantly surprised. Dress size 18 and this fit me great!
3640671
First off, the material is fine. No loose stitching or threads, so thats a plus.

Second, I am 5'7 at 207 lbs and a 38C. Most of my weight is in my legs and hips. I ordered an XL and the top was fine but the bottoms were tight. Yeah it stretches but its still tight. When I saw the bottoms I was scared because they looked so small. Once i tried em on, they felt pretty constricting. I guess i can get by with them, and I can lose some weight to fit into them, but overall those with thicker thighs and hips, get one size bigger because they run small.
2458157
I own four other pairs of Levis Juniors 524 skinny jeans in size 25/1 medium. Two are dark blue stone wash and two are medium blue stone wash.  They all fit great, so I was confident that the black pair would fit the same.  It doesn't. I had to really struggle to get into them, and the others of the same size fit fine.  If I fastened them and the others and held them on top of each other I noticed the black ones are close to an inch smaller than my other ones at the waist.  I was able to squeeze into the black ones, and once they are on they feel pretty good. I'm hoping as I wear them they will loosen up a bit.  Perhaps the difference is that these are totally black with no stone wash and my others have some stone wash...maybe the wash makes them stretchier?  If you are buying these, be aware of this situation when choosing a size.
2267612
I'm always Leary of purchasing clothing on the internet, as a lot of the time things don't fit according to size.
901646
The one size fits all does not apply to me.  I am average, 36 C, not a fatty and the seller did inform me that this item will stretch, but with the baby doll look, I don't want it clinging to me.  If I were 4 feet tall and 65 pounds, I would look great in it.  Disapointed.  It really is pretty, just so tiny.
2046453
One size fits most is a gamble. I was pleasantly surprised it fit; although it was a bit tight in the hip area. Im naturally curvaceous and had to refer to the pic to remind me what it was supposed to look like... I would buy this again
1039623
I have thicker thighs and I'm always skeptical when something says "one sizes fits all." I went ahead and purchased these anyway. They fit real well on me all the way until mid-thigh; they were too tight fitting for me. If you're thinking about buying these and have thicker thighs, you may want to reconsider purchasing these.
3497106
I am very skinny, so skinny i'd be called anorexic. I have long arms and a small body so it's very hard to find sweaters, hoodies, ect. that fit. I've tried many many hoodies out there and they'd never fit. However this is the first time in a very long time that i ordered a hoodie that fit me so well. It was worth every penny :')
1212336
Being a tall, skinny guy I figured I'd buy it at my regular 34" size, and find that, at brand new, it fits a little too snug, mainly on thighs and a too-tight leg band. And my legs are skinny!  After sitting at home with it on for an hour or two, my legs began to tingle from the elastic band being too tight.  So, I'm returning them for the next size, just like others said to do in the first place.  I thought being skinny (I wear average to slim cut clothing) would make it fit fine, but I was wrong.  The quality of workmanship appears high, though, so I'm just going up one size.
4536155
I'm on my school's dance team and we were doing a co-ed dance that was superhero themed (we made the suit into Deadpool) . I got my partener and I both the large/X-large in red. We are  both tall and skinny so I knew it wouldn't be perfect. For him it is difficult to zip his head into it and the fingers were a bit long and he was a bit concerned about the crotch area being to tight, but we are adding tutu's so that is covered, but other than that it was alright for him. For me I have small feet and hands so both of those are really big. It wasn't super tight which I am thankful for. For the price it is really great. I recommend it fully.
163512
I bought it small in the hopes it would fit in the future as I lose weight. It fit tight my first go, but hoping it will fit later on. Then I'll post a pic haha but would recommend if you want something kinky?
953514
i feel like in order to fit in  this, you have to be extremely skinny. my niece is four and is a little chubby so i got size 8 just to be safe and I'm still not sure if its going to fit. She lives in Wales so i guess ill just have to wait and see. Besides that i think the quality is good for the price and i like how the cape is detachable. Im sure my niece will love it but i do think her mom will have to alter it so it can fit.
1727265
I'm 5'6 and 120-something, i usually wear a size 4 and can push into a size 2. Size 4 was the smallest so that's what I went with.
When i tried it on it was a TINY bit snug around the ribs, waist and hips (my measurements are w: 27" h: 34.5).
I would expect a fitted bodycon to be on the snug size, so no points off. Actually it's really perfect because I don't intend to wear this out until i drop a few more pounds.
Would not recommend to anyone who isn't fit/slender-but-curvy. Also invest in good compression shorts if you have high hip flares.