I would rank them as true to size, maybe a bit long. I have 13.25 or so feet, and the Garne 13's fit great.
I am not as built in the calve as Graydog, but not skinny either, I would say they are a moderate calve size. When I try to stuff my jeans into them they get a little tight.
Great boots though, I highly recommend.
ATGATT: When you fall off your motorcycle, you will be wearing what you were when you got on your motorcycle. Dress accordingly.