i would tell her that she needs to make her arrangements. either she figures a way to get to your dress shop or she gets measured herself and calls them in so it is on her (size-wise). give her all the information she needs: dress make/#, store address, store #, etc. also check with your dress shop regarding the orders. one of my (former) bridesmaids was giving me a problem about getting measured...two months went by...and the shop finally called and said they hold the order until all girls have measured and paid deposit so they would all come from the same reel/dye. if that's the case, tell her she has until __ date to measure and order or she'll cause problems for the entire party. dresses are not an unknown when asked to be in a wedding!!!
Marriage is about two people,
one who never remembers birthdays,
and the other who never forgets.