i will start off by saying that i am a double D cup size and i wasn't really expecting to find a binder that really makes a difference. i'm about average sized in every area except for my chest though, so i'm not sure if this binder will work well for individuals who are a little on the heavier side.

i bought a size large in the grey. i found that it was easier to clip the side where i wanted it to be and then slid it down over my head. it took a moment to figure out where my breasts were supposed to fit, but i found that letting them just hang naturally the way they usually would without a bra and then putting the binder over top worked well. at first when i put on a shirt, i looked like a sausage shoved into a casing that was too small. not flattering. i remedied this by putting a sports bra over top and that seemed to do the trick. as i write this i am sitting at a desk and have had it on for two or so hours. and man, this thing is super comfy.

if you have a large chest and put a shirt on over this it WILL make your shoulders look pretty wide and chest look like it's made of solid muscle. think abby from the last of us. i'm not a big fan of that effect, but putting a loose hoody on over top makes my chest look like it's barely a B cup size. note: if you have a large chest it will not make you look totally flat. that's simply not possible. however, it DOES make your boobs look significantly smaller.

Comfort: 5/5
Stretch: 5/5
Flattens: 4/5
True to size: 5/5
Style: 4/5 (i think it would be perfect if the binder was longer)

I think it's important to give a bit of context for my review -- so bear with me before I get to the actual product review, as my experience heavily impacts my satisfaction with this binder.
I am five foot two inches, but I have had disproportionately large breasts my whole life. I'm talking 36DDD AND low density breasts, meaning that they sag down to the bottom of my ribcage. "Just don't wear a bra" is something I've never heard and can never do. Growing up, my mother forced me to wear underwire bras, which are so uncomfortable and did nothing to hide how big my breasts were (and still are). It made (and still makes) shopping for clothes a pain, and I can't wear anything even slightly lowcut or form fitting due to the stares and unwanted comments from men.
I've always wanted to be flat chested -- the maximum amount of boob that I ever want is an A cup. I saw a review here from someone wondering why a person who isn't trans would want a binder -- so for anyone wondering... for me, having breasts comes with a lot of pain, shame, and downright inconvenience. I don't want the pain of having breasts anymore, but unfortunately breast reduction (and likewise top surgery) is expensive and has a long wait list. So in the meantime, I've turned to binders to have the euphoria of having no breasts/being flat chested.
My one experience with a G2B binder (a competitor) is that it was WAY too small (I'm talking "wouldn't fit over my shoulders" small) and it had absolutely no give in the fabric. The fabric also felt like swimsuit material and didn't feel very breathable like cotton. I ended up giving the binder to a friend with breasts half my size (if not smaller), and it ended up being tight on HER.
This XUJI binder feels more like cotton or spandex. The fabric has some give, but not as much as a T-shirt -- think tight leggings. It binds from the side and, like a bra, you can make it slightly tighter or more loose depending on your size. For me, the fabric/comfortability and ability to adjust the size make this binder a winner, even if it can't make me completely flat chested. Due to the size and low density of my breasts specifically, I don't think any binder could make me completely flat, so I'm happy with how this XUJI binder makes me look and feel.
My only concern with this binder is I'm not sure how safe it is, especially for trans folks who want a completely flat look and feel. I would get a G2B binder if possible because those are proven to be safe.
One last important note: get your bra size, NOT your shirt size. For shirts, I wear a medium, but a 36DDD ain't a medium lol. I got a 3XL and it's still a little tight on me.

Me: Non-binary trans masc, 5'7, 44" bust, around 200+ lbs.

Let me start by saying this doesn't fit the standards for a "safe" binder, as the elastic goes all the way around the rib cage instead of only compressing across the front. I would urge anyone who purchases this binder to order larger than they think they need. Binders that are too tight can restrict breathing and can cause harm to your rib cage and lungs. Knowing all of this, I chose to make this purchase anyway.

I ordered two of these last year and was generally very happy with them. Lots of euphoria with a flatter chest, and overall a comfortable way to achieve it. I've gained some weight and was getting tired of fighting with bra extenders so I ordered three more in a larger size this week.

DESIGN
I was excited to discover the new black and white ones are longer than the ones I ordered last year. They have 11 clips instead of 8, so they cover more area and reduce roll-up. For some reason, though, the teal color did not have the 11 clips like the other two (despite all being the same size), which was disappointing.

I agree with other reviewers who have mentioned the elastic line at the top being a bit annoying, but it's not unmanageable for me.

I like the coverage and can breathe pretty easily, but it is important to take breaks from wearing it.

MATERIAL
The solid black and solid white colors are a t-shirt like material, and the teal is a slinky sport material.

I made the mistake of putting my old binders in the dryer a few times, which is what I attribute the curling to, so I'm hopeful that with proper care the new ones will hold their shape better.

DRESSING & FIT
The best way to put this binder on is to clip it first, and then put it on over your head like you would a sports bra. Then adjust as needed for a flatter look. Unhook all of the clips to remove.

I like the amount of coverage it has across the back. The longer design does cause some digging/irritation at the bottom edge of the clips, especially if you're a larger bodied person (expect more rolling up, as well).

I will update this review later on after I've worn and washed it a few times.

Trans/nonbinary user. Ive had this product since the end of July. I only have some experience with a used high quality binder thats slightly too big for me to compare it to, which i have had for nearly the same amount of time. This is very much a "babys first binder" as I wanted to see if investing in a more expensive binder eventually would be worth it.

Pros:
-Compression isnt uncomfortably tight, easy to wear for hours without thinking about it
-Doesnt ride or roll up
-The soft material above the compression part of the binder creates a sort of illusion of pecs on small chests as the fat gets pushed/spread out.
-Gets my chest completely flat

Cons:
-Its not a breathable material, you will sweat
-The line where the compression begins is visible as is the bottom of the binder in light colored shirts and tight shirts.
-the stretchy material at the top may create a shelf/corset boob effect on bigger chests rather than the pec illusion im experiencing
-the material of the compression is not comfortable against the skin, should have lining tbh

Overall, for the price, it did the job and gets 4 stars for a quick solution to dysphoria. If you are small chested and think a compression sports bra is enough/dont think its worth it to spend the money on a brand name binder, i recommend you give this binder a try so that you can make an informed investment.

This would definitely work for small chested cosplayers easily.

Okay I love it ofc but if I could buy a better one I would! But I love, what u don't love is how i got a size for me but it still doesn't flat it (which is expected) when I sit down my boobs become visible but it's comfort and can be worn a lot!