12ga = .729"
13/1 = .719"
13ga = .710"
14/1 = .701"
14ga = .693"
15/1 = .685"
15ga = .677"
16/1 = .669"
16ga = .662"
Note the intermediate sizes are not "True Gauges" but the gauge above & below averaged & all digits beyond 3 decimal places dropped, not rounded. As the gauge sizes are already rounded to 3 places then the 4th digit will of course be either a 0 or 5 but if a 5 it is not rounded up as customary, simply dropped.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra