Large-labia problem... I'm not interested in women without them!
The larger the better. If you are a woman and you think your lips are TOO big.. You're so incredibly mistaken.
They're the most beautiful parts of your body you could possibly imagine.
That's a pretty blunt way of stating it, but I think it's better to be honest about it than to hide your preference. At least you won't waste her and your time when you meet someone who doesn't meet your criteria.