Just in MC's defense, a little: this is a casting call, after all. Maybe they already have enough models/photos of women in midlife and beyond, and in sizes between the ones they're calling for? They don't have a lot of photos on their website, but this one definitely looks at least 40 (to me), and they have chest photos of models wearing C cup bras.

Personally though I can't wear their bras just because my b00bs are too low! Don't know if that's an age thing or not! But the band cuts into what's meant to be in the cups... not good!