While the numbers are clearly not "fair", I'm still at a loss as far as what could really be made to equalize the numbers. Male specific outfits aren't exactly abundant in relation to female specific outfits IRL, as far as sources go. I guess since you're going based on numbers, you'd be happy if bucket armors were male exclusive, that sort of thing? Personally, I really don't care for most female-only gear. I'd probably go as naked as possible if I had a male character to glamour. I just think the numbers aren't very important, but rather the substance is. Unfortunately, as I stated, male specific looks aren't exactly overflowing in the world of fashion. I'm fairly sure that the only things most of us would think of is some generic rehash of something already in the game. Maybe someone actually has a unique idea or two, but that's still far from reaching near equal.
Womens fashion is just much easier to work with by default, which is why there is more to it. I mean, imagine someone like Vin Diesel in something like the bunny outfit or something Katy Perry would wear. Humorous, but not exactly appeasing to the eyes for nearly everyone, including much of the gay community. Now think of something that he would look good in, then think if a woman could pull it off as well. Muscle shirts, for example, are widely seen as masculine and sexy on fit men... but put a woman in one, and it's also seen as sexy. Besides that, the concept of "playing barbie", as some folks would say, isn't exactly fun to a lot of male gamers. Mind you, that's an extremely ignorant outlook for many obvious reasons, but it's still one that many (dominantly) male gamers stick to when it comes to attire, but not how the customization of the character model looks, hypocritically. Mind you, I'm all for them making female only attire unisex, as it'd make things a lot more entertaining and expressive, if not to just make the ratio closer to equal, but it's fairly clear why there are understandably more female clothing than male.