I am doing this so readers can get an idea of how the dresses will look so here you go, but I can't put pics in this story ( no idea why?) so here is the website :( .
Ginny's black dress
http://www.foxgown.com/uploads/product/1/0/10004/plain-black-lace-v-neck-floor-length-slim-a-line-sleeveless-bridesmaid-dress-1.jpg
Hermione's maidtren of honor dress
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRrXQ-BCbbIsZgUQGYQP8LtMLr6Fu8pJQtIpwq5syoe8BVKvNtb
Angelina's brides maid dress
http://www.200shop.com/images/20111126175625608.jpg
Fuer's brides maid dress
http://media-cache-ec0.pinimg.com/236x/f0/49/49/f049491c946dda4f8beee3d76aa16e0c.jpg