I'm thinking of getting a couple color swatches in shades of gray and sending it to my three bridesmaids and telling them to pick out a dress that's knee length or tea length. (And yes, I know it's a little early to have bridesmaids already asked, but my wedding was moved from May 2010 to January 2011 so I have already asked and will not be someone writing here in the future with regrets as I asked people I wanted standing up next to me and that's it, my sisters and dearest friend) Since my wedding is in January, and the weather will probably be cooler, what type of fabric might work best? I'm thinking of giving them two different options. And when should I send them the cards with the swatches? Thanks so much for your advice!