Your bridesmaids dont have to match. What I did for my maids was, same dress and shoes, but they can choose any jewelry they like as long as it's silver and the hair can be any way they want as well (as long as its not up). I want them to show off pretty as well. A hairstyle that goes well with her face. Jewelry that accents the dress.

If they match down to the T...then it becomes boring and very "robot" as I like to say.