I chose a 38 belt even though none of my pants are 38 (mostly 36, but also 34), so I've got only less than a inch of adjustment left in the belt and it's definitely a bit too large for me, but it works nonetheless.
I want to second what josey said, the belt is quite heavy. Not that you'll notice when you are wearing them. A tip though, if you are sharing a room with some one, and your roommate's asleep, please hold onto your pants after you've undone the belt and the fly, 'cause otherwise your pants will drop down to the floor (they're weighted after all!) with a loud BANG, a good dent on the wodden floor, and groaning roommate. /ubbthreads/images/graemlins/grinser2.gif /ubbthreads/images/graemlins/tongue.gif