| Russia gauge number. | Birmingham wire-gauge number. | Thickness in decimal parts of an inch. | |
| 7 | 29 | .013 | |
| 8 | 28 | .014 | |
| 9 | 27 | .016 | |
| 10 | 26 | .018 | |
| 11 | 25 | .020 | |
| 12 | 24 | 1⁄2 | .021 |
| 13 | 24 | .022 | |
| 14 | 23 | 1⁄4 | —— |
| 15 | 22 | 3⁄8 | —— |
| 16 | 21 | 1⁄2 | —— |
The following table gives the gauge numbers to which galvanized iron is made.[26]
[26] Galvanized iron is made to the Birmingham wire-gauge, the thickness includes the galvanizing, the sheets being rolled thinner to allow for it.
| Gauge number. | Thickness. | Gauge number. | Thickness. |
| Inch. | Inch. | ||
| 14 | .083 | 23 | .025 |
| 16 | .065 | 24 | .022 |
| 17 | .058 | 25 | .02 |
| 18 | .049 | 26 | .018 |
| 19 | .042 | 27 | .016 |
| 20 | .035 | 28 | .014 |
| 21 | .032 | 29 | .013 |
| 22 | .028 |
In the following table is given the American gauge sizes and their respective thicknesses for sheet zinc.
| Gauge and Thickness. | Gauge and Thickness. | ||||
| Number. | Approximate Birmingham wire-gauge. | Thickness in fractions of an inch. | Number. | Approximate Birmingham wire-gauge. | Thickness in fractions of an inch. |
| 1 | —— | 0.0039 | 16 | —— | 0.0447 |
| 5 | —— | 0.0113 | 17 | —— | 0.0521 |
| 6 | —— | 0.0132 | 18 | —— | 0.0596 |
| 7 | —— | 0.0150 | 19 | —— | 0.0670 |
| 8 | 28 | 0.0169 | 20 | —— | 0.0744 |
| 9 | 27 | 0.0187 | 21 | —— | 0.0818 |
| 10 | 26 | 0.0224 | 22 | —— | 0.0892 |
| 11 | 25 | 0.0261 | 23 | —— | 0.0966 |
| 12 | 24 | 0.0298 | 24 | —— | 0.1040 |
| 13 | —— | 0.0336 | 25 | —— | 0.1114 |
| 14 | —— | 0.0373 | 26 | —— | 0.1189 |
| 15 | —— | 0.0410 | |||
The Belgian sheet zinc gauge is as follows:
| Gauge number. | Thickness in decimal parts of an inch. | Gauge number. | Thickness in decimal parts of an inch. |
| 1 | .004 | 14 | .037 |
| 2 | .006 | 15 | .041 |
| 3 | .008 | 16 | .045 |
| 4 | .009 | 17 | .052 |
| 5 | .011 | 18 | .059 |
| 6 | .013 | 19 | .067 |
| 7 | .015 | 20 | .074 |
| 8 | .017 | 21 | .082 |
| 9 | .019 | 22 | .089 |
| 10 | .022 | 23 | .097 |
| 11 | .026 | 24 | .104 |
| 12 | .030 | 25 | .111 |
| 13 | .034 | 26 | .120 |
The gauge sizes of the bores of rifles are given in the following table,[27] in which the first column gives the proper gauge diameter of bore, and the second the actual diameter containing the errors found to exist from errors of workmanship. The standard diameters are supposed to be based upon the number of spherical bullets to the pound weight, if of the same diameter as the respective gauge sizes.
[27] From The English Mechanic.