Is there such a thing as half gauges (AWG) of magnet wire used for making pickups?
Yes there is and I often find that this is very useful when trying to wind a coil to a specific number of turns and getting the right D.C. resistance. The chart below will show you the most popular wire gauges and the differences between the whole and half gauges. The half gauge wire is more expensive and I try to get samples to experiment with.