Rear Wheel Hub Nut

This question pertains to a 1993 325is. Can anyone tell me the socket size (millimeters) for the Rear Wheel Hub Nut. The nut requires a twelve point socket and appears to be somewhere between 30mm - 34mm. Unfortunately, everything I've been able to read talks about 30mm, 36mm, or 46mm when discussing axle and/or hub nuts. Thanks in advance.