So I've been wearing a 34 A for years now, and I finally got sized today and it turns out I'm a 30 D (Which means I have a 30 inch ribcage and 34 inch bust) Whoops. I've googled it and it turns out that 34 A isn't equivalent to 30D, 34B is. The new size definately fits better and I have no idea how I went this long without realizing it. So, I know I'm still not huge or anything, but will wearing the correct size make me look... different?So I've been wearing a 34 A for years now, and I finally got sized today and it turns out I'm a 30 D (Which means I have a 30 inch ribcage and 34 inch bust) Whoops. I've googled it and it turns out that 34 A isn't equivalent to 30D, 34B is. The new size definately fits better and I have no idea how I went this long without realizing it. So, I know I'm still not huge or anything, but will wearing the correct size make me look... different?

Of course it will. You will have better support and should shape out better in your clothing.

Wearing the correct size will make you appear different because now your breasts are actually better supported. And it's easy to be in the wrong size for year ;P stores hate to size you properly and bra companies absolutely love lying to us on how to size.

It should. It'll help you have more support and your breasts will look the proper shape. If you want them to look really different, grab a push up bra or balconette bra in the new size :]

Probably not, your clothes will just fit better. If the A was too small, your breasts would have been peeking out the side or top anyways, so it is not like you will look a whole lot bigger.