i only use binders from gc2b because i think their customer service team is quick and very active. their binders are also not so uncomfy like others and you see real results if you compare in pictures.
i haven't worn binder again in like years. i pass most of the time because i got a pretty small chest. just like you, my shoulders are a bit big too. i find it hard to choose between small or medium. i'm like it must be either too small or too big. lol.
i got my binder last time from them, but i must have gotten some weights and i'm thicker than i thought. so i exchanged for a bigger size during christmas time and new year eve. i thought i'd get a reply in like first week into January. but oh gosh they replied quickly during the holiday time. so i reordered as soon as the return passed their inspection and got my binder few days after.
i think all binders need to be hand wash and take care carefully. plus, they're clothes, just for special purposes, so they will get worn out after awhile.
i used to ask my mom to use some kind of materials to put in my tank tops. we went searching for the materials, they're not even the ones using in most binders. but just to cover my chest area and make sure no nipples showing. except it wasn't tight at all, so it could be slip out of the chest area if i move around too much. lol. but it worked. after awhile they got worn out. ever since i didn't use binder till now. lol.
i agree. if it makes you feel a bit painful in anywhere near the chest area, go for a bigger size. i feel like i don't wear it alone, but with other layers of clothing. so it's fine if it gets a bit loose. i actually prefer it that way for comfort.