32mm, go to local parts store and get a hub socket kit. Advance has pretty good loaners around here. Definitely break it while it is on the ground, made that mistake as well. When you are retorquing it need to get it to 188ft-lbs.
The hub is pressed into the steering knuckle and has three bolts holding it on. You will need to take the rotor and caliper off to get at them as they are on the back side. If you have ABS will need to remove the sensor from hub as well as well as the little rotor cover thingy.
After the three bolts are out, (think they are 14mm) then you can get at the hub. It is pressed in and is a bi**h to get out. Will need a good hammer, a chisel and a couple of beers.
Good luck, just went through most of this (minus the hub removal) on a CV axle replacement attempt. That is right, I said attempt....lol CV was completely bonded to the front axle with rust so I ended up re-assembling; it is a DD and couldn't have it down to get the shaft out, pressed from the CV and back in....sigh.