Yeah, the actual specification of 'big' in this community are pretty loose.
As long as the boobs/cleavage are noticible (not flat) I am just gonna allow it. If people don't think it is 'big' enough, they can always downvote it to oblivion.
In the future I'll probably add this clarification in the sidebar because you are not the first person to wonder/comment about it. Cheers.