I was a bridesmaid seven times before the age of 13 (youngest girl in the family, by quite a way), between 1979 and 1990.
The dresses were itchy and icky and none of them could be worn anywhere other than at a wedding.
So when I got married in 2012, I decided that my "grown up" bridesmaid (I only had one) could choose her own dress (which ended up being a beautiful Monsoon silk dress that she's worn many times since to fancy dinners etc) and worked with the mum of my little bridesmaid/flower girl to find one that wasn't itchy or nasty. She's since worn her dress to at least two other parties.
This is the three of us just before I got married.