To follow on with Phil's comment, once you start with Halo Goddess' tuts, you can't trust those first measurements. For me they were over-sized but they certainly were the best starting point. I tested the measurements with 3 passes for each piece out of printer paper until I found a size that fit snuggly (and even my final suit wasn't snug enough). You have to eyeball every piece when you test them, gather all the reference images you can find, they will tell you where a piece will start and stop (like the forearms, you know they will overshoot the elbows but an inch or so), its a gamble but its rewarding in the end.