Quick question: Even if we accept that God only wants people to dress appropriately for their own gender, who decided what clothing is gender-appropriate?
A non-bifurcated lower garment is feminine, unless the person looks like they'd beat you up, in which case it's a kilt and it's ok.
Bifurcated lower garments are for men, unless they're extremely tight--unless (this is an exception to the last 'unless') it is roughly the 1700's in Europe, in which case, hose are manly.
It is vitally important to make sure that your top is appropriate to your gender. You can tell if it is because the sleeves of men's dress shirt's button in a "kissing" way and are fastened with cufflinks, and the sleeves of women's shirts button by overlapping. This change in buttons is vitally important, because if a woman wears the cuff of her sleeve fastened wrong, it's a mortal sin and a crime against nature.
On to hats! A man may wear a small hat, with a visor-style bill, or a small brim, like a fedora. A woman must wear a wide-brimmed hat. A man may wear a wide-brimmed hat *only* if it is made of straw, and he is in the sun. Men may wear helmets, but women may not because they mess up their hair, and women should not be doing things that require helmets, anyway. Men may wear tight knitted hats (often called 'winter hats') but women may not, for the same reason as helmets (if it's cold, they should just stay inside so as not to upset their delicate senses).
Both sexes may wear vegitation in their hats if they choose to. If so, women may only wear vegitation with blossoms, and men may only wear stalks of grain, most commonly wheat. Remember, if a woman puts a stalk of wheat in her hat, it is a crime against nature, likewise a man with a blooming plant.
shoes-- not much to be said here. If it's a shoe that will offer support and keep your joints in alignment, men may wear it. If it will destroy your knees by the time you're 20, it's a woman's shoe. It's probably best that she not wear them at all. Besides, it's hard to walk in them when you're pregnant.
one-piece garments-- men may wear one-piece garments as long as they are bifurcated. Women may wear them as long as they are not. Anybody in the Middle East may wear a non-bifurcated one piece garment, however, as well as anybody born before the Middle Ages. Also, either gender may wear a non-fitted, non-bifurcated garment in bed, while they sleep.
Loincloths-- ummm.... well.....
Remember everybody--these rules are written in stone, and anybody who violates them is an abomination against God and nature. Sure, they might *look* arbitrary, but God has decreed each and every one of those rules! If your salvation depends on whether a piece of fabric covers your inner thigh, or drapes around you (with various implications depending on time period and culture, status as a Scottish warrior and time of day), it behooves you to learn when it's appropriate and when it isn't.