As you can see in the first picture, the binder I received was incorrectly made with the hooks facing the wrong direction. It's still usable it just sticks out on the side a little weird so I wanted to keep the binder and get a correct one. I contacted the seller asking if I could keep the incorrect binder and get a discount on another one and they said I could keep it and they'd send a replacement for free. While I was at it I noticed the small size was a little tight for my liking on the largest set of hooks so I asked for a gray size medium. The second picture shows them both so you can see the size difference. The gray one is perfect and I wear it on the 3rd smallest set of hooks for a some binding but not too tight. I can go tighter or looser as needed. For reference I'm ~100 lbs and 5'1" and my chest size is 34". My cup size is somewhere in the B/C range. This meant I was between small and medium and based on reviews I got small, but for me I needed a medium. I can wear the small but the medium is more versatile for me.Now let's talk comfort and binding ability. This does not bind as much as my GC2B, and you can't expect that. However, I prefer binders with hooks so if I need a break during the day it's so much easier to unclip for a few minutes in the bathroom then reclip than totally undress to pull it off over my head. I have another binder from somewhere on Amazon that's a long piece of elastic with three rows of hooks. It's pretty good, but the elastic likes to roll up at the bottom a bit which is a little weird to wear. I'd say this one is better. The mesh back is nice and feels really cool and interesting and it's just so comfortable. With tight things like this and even stuff like socks you get those lines in your skin from wearing them for a while. With this binder there are almost no lines on me when I take it off even after 6+ hours. I've only seen a tiny line under each armpit and a little mark on the side with the clips. To me this seems like it's digging into my skin less which seems like a good thing. Again, you won't get as much bind as a GC2B, but this does better than a sports bra. The one "weird" thing is that because I have it on a fairly tight set of hooks the mesh that covers the front bunches up a little on the left shoulder strap. This is only a problem if you wear a tight shirt or you're shirtless I suppose. It looks a little weird but you can't see it under normal clothes. This is just what will happen with multiple rows of hooks I think, so I'm not sure there's a solution, and again it's hardly a problem. With the mesh material I was afraid it was going to rip, but I've worn the gray one for around 24 hours total (over a period of like 3 weeks) and it looks like it's still fine. I wash it with my clothes on normal settings but I hang dry it. This binder is amazing, at least for someone my size, and I'd highly recommend it.I am 5'4" and 165 lbs with an average to athletic build (broad shoulders). My chest is approximately a 38DD. I ordered the XL in this binder because that is typically where I fall when it comes to my chest. I usually wear a M/L shirt in men's for more reference, and I am on a quest for my chest. I am searching for another chest binder that will do the trick since I am FTN.When it comes to this binder, I wanted to love it because the material is so soft and breathable (a rare find in many other binders), but my chest is just too wide set and heavy. If I lift my arms in this binder, my chesticles just fall right out the bottom of the binder, and I foresee myself constantly adjusting this thing. So I returned it, and my search continues.BUT - this binder would probably work splendidly for a smaller chested person. It's not a bad product at all, and I only gave it a 3/5 stars because it didn't work for me. However, if I had a smaller chest, this probably would've been a winner.Good luck on your own search!ok so when I first got this I was super excited it worked well but as time went on it loosened and it didn’t bind as well as it had when it was brand new so I think it would work for a smaller chest but I have a larger chest so it stretched out for me igI had a lot of hope for this based on reviews I’d seen despite being a cheaper binder.The pro:* the fabric feels nice, cool and comfy.The cons:* I have a small frame (32) but a large chest (ff) so normally a small would be a little too tight on me. The product fits far too loosely and like a sports bra, only providing as much compression as a cheap Walmart compression bra, even on the tightest clasp on the size small.* The actual binding area does not cover my whole chest, so if you are smaller framed but with a larger chest you will have a lot of spillage, mostly up top, and very minimal compression.* The shape overall is also lopsided and again if you have a larger chest, compresses more on and leaves a noticeable indent where the strip that provides “compression” is.So overall:* For the first time out of every binder I’ve ever purchased over the years I recommend sizing down, unless I personally was just unfortunately unlucky with the sizing.* If you have a small chest, between a and d this will probably be great for you. DD and larger, honestly although more expensive it’d be better to go with underworks or gc2b to avoid going through the same dysphoria induced mini breakdown I did over the fit lol*If you are similar to me up top this might be nice to have to wear around the house with a very baggy shirt or hoodie, somif that’s what you need great. But if you’re looking for something that actually flattens you for public wear this is not the binder.So first up, I am kind of between medium and large, so I went a size up and got a large because, y'know, asian sizes, you always go a size up. I am now confident I could have managed a medium, because I can comfortably wear this at its very tightest setting, but I'm very happy because:This is the MOST comfortable yet MOST effective binder I have worn in my entire life. And I've tried Underworks, Gc2b, and one or two others. This doesn't result in any weird shelfing, it doesn't hurt my shoulders or armpits or create bulges at the armpits, it doesn't bite into the skin anywhere, and I've accidentally fallen asleep in it because it's legitimately more comfortable than a sports bra. Yet it completely eliminates the appearance of boobs (well, mine, I'm a large B cup, maybe a small C.)I don't need help getting it on and off because of the side-closures, there's no rib pain, no back pain, and it doesn't make my back sweaty. Every con I assumed was "just part of wearing a binder", this doesn't have. Next binder I get will be another one of these. I cannot recommend enough.the mesh makes it super breathable but i’m sure you also lose some flatness since the material gives so easily. that’s exactly what i was looking for but the same can’t be said for everyone so if you’re looking for absolutely flat maybe get one that’s got the thick material all around! but yeah, had the product a couple months now, i ordered it at 160lb and i’m now like 150 so the amount of loops is great, good for when it’ll inevitably lose its stretch over time too :) oh + i think my cup size is a B but i don’t wear traditionally bras (obv) oh and one side is bigger than the other and it compresses it pretty evenly if that’s an issue for youI bought a medium and it came in a very small size, when I tried it on I was so excited but it didnt fit. I liked the idea of the mesh back since I'm athletic, I just kinda wish there was something I could do about itAwesome