Gives new meaning to Wonder Bra
I'm not making the point that she doesn't have large breasts, that is for another thread. I agree, but its not the main part of my post.
This post is about the outfit. It is made to make her look like she has ample boobage for the character. (Don't snicker on my choice of titular phrasing, it is meant to lighten up the topic)
So, they made an outfit that adds what she needs to complete the look. Why didn't they just pick someone that has what we have come to know as "Wonder Tits". I doubt they will pad all of her outfits as Diana Prince, so is that how her secret identitty works? It would totally work. ("Diana can't be Wonder Woman, Wonder Woman's got bigguns")