AWG vs SWG in Measurements

Measuring my existing wound inductor wire. This wire was on a very old Aluminum roll and I would have guessed it’s American wire gauge so I used imperial micrometer to measure it. Comparing the table with my direct measurement, it’s either 26AWG or 27 to 28SWG. The Enamel affects the size of course so it’s often a little fiddly to get an exact wire measurement. If the enamel is 0.007″ thickness, the wire is in fact 28SWG
Examine my photograph:
measure wire
If you would like a larger photo click this link (2.5MB):
Measuring the copper wire large