My medium gc2b binder arrived today after I experienced grave disappointment with an XS one from Underworks, apparently it was way too small. However, I am starting to worry there's something strange going on with my body as I have pretty small breasts, and according to the measurements which I accurately did with the help of someone else, I'm definitely a medium. Still, when I put on my new binder, it hurts my breasts, neck and shoulders very much, and in a panic I took it off minutes later. What now?

I bought a wrong size GC2B binder bcos I bought it on the basis of what size my Underworks binder was and I'm inbetween sizes. A new binder should cause some achyness but it shouldn't be painful. You might want to get a size bigger. How broad your shoulders are will also affect how well your binder fits.

Btw; I'm a 36B and wear a medium and it fits perfectly and causes me no pain no matter how long I wear it for.

I had a problem with them. They told me based on my measurements that I wore a size 2 too small than what I needed. They said large and then I tried that and it didn't fit. I ordered an XL and it was still too small. Finally I got one that fits.

I had a similar problem with my size m GC2B binder. The measurements were supposedly fine but I think my shoulders are broader than perhaps is expected for that size? I have a smallish chest, B-cup. I couldn't get into it when I got it last summer, and put it away till this year. I've lost weight since then and it fits well, now that I can get it over the shoulders. So perhaps going a size up despite the measurements might be a solution?