It’s rude for any one other than the bride to wear white.

I really thought this one was common knowledge but I keep going to weddings where the sister of the bride is wearing a short mini dress. No one notices the bride. And when you are wearing a meringue and someone wears a sexy dress and stands next to you will look silly. Very silly. So be slightly conservative when you chose bridesmaids dresses. You must not make them ugly but they should not be super sexy. Unless you are not marrying in a church and you wear a super sexy bridal dress.