Bridesmaid dresses and centerpeices

I have 4 different bodies to dress for my girls. I am picking a color and material palette for them to find a dress that they like and are comfy in. They have all said that they will whatever I want them too, but I don't think one dress will work for all of them. the dress they pick has to be floor length, with straps of some sort, black and non-shiney material....the rest is up to them.

ETA: spelling and clarity

Someone had suggested that too me. My only problem is my OCD will get the best of me looking at those different dresses. I like a uniformed look. Plus my daughter is in the wedding and I wanted her dress to stand out..so if they are all different she will not stand out...ugh...Thank you for the advice..I will revisit the idea. I have certain designers I like so I may have to conform to that..

Pick a flowy material with an empire waist. If you have a large busted bride maybe consider a dress with straps- they can easily be added to most styles. Think fitted in the bust and flowy downward. Looks great on every body type.

Try something like this: http://www.dessy.com/dresses/bridesmaid/6663/#.UlHl34aThy1

or

http://www.billlevkoff.com/bridesmaid-dresses-and-formal-dresses/fabric-chiffon/