I bought a shirt the other day that is gorgeous and looks good on me. but the thing is it's low cut. And I'm pretty flat chested, 30B. So when I wear this shirt, I do get a bit of a cleavage thanks to a great bra, but I feel like because I'm flatted chested and I'm showing some cleavage...it's kinda sad lol, like I'm trying too hard.
Actually I find that skimpier clothing looks good on flat chested skinny girls. When a more curvy girl wears low cut tops and short skirts and stuff it looks slutty. Sorry curvy girls but it's true- I'm skinny but I have big boobs so I have to be careful. I think girls with big boobs look better in turtle necks and crew necks than flat girls.
Wear it. Just because it's low cut doesn' t mean you have to have big boobs. You may be right in that a bigger chest will fill it out more but I don't think that means it won't look good on someone smaller.
Don't wear it if you don't feel good in it. You should wear stuff that compliments your body and your form, but mostly makes you feel attractive. If you think that the top works better for a different body type then keep shopping.