I ordered these boots and the Sporty (same boot, regular calf) because I sometimes have a problem with the calf being too narrow for my muscular legs.  Not so with these boots.  They run at least a 1/2 size too big, and the calf is a good 1-1/2" inches too big.  The Sporty fit just great with room for jeans.  They also run at least a 1/2 size too big.  I normally wear a 9 and ordered an 8-1/2.  I have plenty of room in these for thick socks.