Depends doesn't it.
Fifties are longer than tens, but if it's rammed full of tens making it girthy opposed to a single 50, then it's girth all the way.
A fat wallet is exactly that.
A bit of both, but not too much of either!
Or, it depends greatly on the woman and most aren't overly bothered and would list face, personality and body shape over penis size in their list of desirable attributes.