I know this is a super old thread, but was trying to hunt down ideas for "fashionable" medical alert jewelry.
I did want to say that having a medical card in your wallet is not enough; most EMT's will not go hunting through your wallet or purse before they start administering stuff. If you have a medical alert jewelry that says "see wallet card" they will, but they don't just search on the get-go. At least, that is the case around here.