Get a medium and gain some weight man.
Seriously though, if you intend to get bigger, get the medium. If you're referring to Inzer belts, either one will fit you fine now. The 3 inch measurement they go by is the middle of the adjustments you can make, but it will fit a larger range.
I have a feeling it will take absolute fucking ages to arrive, haha. What colour did you get?
I think I'm just gonna get black
Dunno about that, I ordered last thing Monday night and the belt was on my doorstep in Cambridge the next Friday, if it takes less than a week to England I wouldn't think you'd get too fucked going anywhere else.
Oh wow. I remember reading that someone (likkuid? WL? hunto?) had been waiting like MONTHS for theirs to arrive. A week international is pretty damn good.