Merida sizing chart

alomac Posts: 189
edited October 2010 in Road buying advice
I'm currently considering a used Merida Road Race, but before going to inspect it (some way away) I'm trying to find out if it's the correct size.

I'm 6'4" (I don't know imy inside leg) and the bike is what Merida calls '55XL'. I'm not sure if that's big enough or if I would need the 57.5XXL. I've been searching Merida's site for anything that would clarify but have found nothing. Does anyone know?