STYLETHREAD -- LET'S TALK SHOP!

I know this should probably be in the wedding section, but I figured it would get more responses faster here (don't hate me!)

I'm trying to think up gifts for my bridesmaids (two of them are my sisters and 1 a cousin, two friends). I'm trying to keep it under $100. What do you normally spend on such a thing? I want this gift to be really special and show them how much they all mean to me, especially my sisters. Any ideas? TIA