To know the exact diameter of the wire will fail, and no micrometer or Vernier caliper, if you use … normal range.
This is quite tightly wound on the rod a small number of turns of wire, then measure the width of the winding divided by the number of turns: the number obtained will be the required diameter.
Recommend to read
WHY THE “CRY” OF THE FURNACE?
Along with gas stoves and fireplaces for many gardeners often pay tribute to the various kinds of furnaces — heating and cooking options to traditional Russian. Especially in homes...
THE BEST SAUNA HEATER
Outfitting your bathroom under the bath, he decided to make a strong (about 3 — 3.5 kW) and reliable heater. The most appropriate seemed to be elektrokemisk in a tin bucket with asbestos...