@undercover92: Don’t be entirely beholden to what your think your size is, because each company is different. In a regular bra, I’m a 38DDD/E/F (it varies so widely), in a long-line bra, I’m a 42 Dirty Delete. As a PP said, the support is under your bust, not in the actual cups. Sweetheart dresses are typically great for a larger bust, because the shape usually covers and helps keep everything in place. With a good strapless bra, it needs to fit your torso first. Its a bit of a different feel to get used to. When you have a larger size bust, a regular strapless bra isn’t going to do you any favors, and it won’t provide support. Girls with a smaller cup size can pull these off, but larger bustlines won’t get the support they need. I agree about the corset back (unfortunately, I didn’t want one for my wedding gown), they are really flattering and you will actually feel very supported. I do NOT recommend having cups sewn in, although many people will tell you that its a great option, don’t do it.
I purchased this one a few years back for a wedding I was in. Surprisingly, I loved it so much I wear it regularly. I brought it with me when I tried on gowns and it did very well. I won’t be wearing it with my gown, however…I will most likely be purchasing a longer bra. 🙂
There is a microfiber/foam one that I do not at all recommend for a larger bust. It’s molded foam and the cups (being molded) just don’t fit quite right. It also takes up like an inch of space in the dress…which is about a size…
This one is lovely, longer, and low-backed. http://www.laurensilva.com/Lace_Low_Back_Plunge_Strapless_Brasselette_p/domi-7749.htm
There are a few really good websites you can purchase from, I just know that lauren Silva has a great selection, so its the one I know I can find good samples at. I don’t work for them or get kickbacks or store credit (unfortunately!).
I definitely recommend getting one to get used to before the wedding, wear it around, get comfortable in them, it is totally possible. I don’t recommend spending a ton though, because the style of your dress will dictate what you need for a bra. You can feel free to message me about it if you’d like. 🙂
I worked at a David’s bridal, have done a lot of fitting on larger busted brides, know a lot about their fabrics (well, fabrics in general) and bras. It is definitely not as easy at it seems. 🙂