So, since I've gotten into making chainmaille, one thing that has annoyed me are the chainmail (AR2) specs:

Chain mail must be made with links no larger than 1/2" rings of 12-gauge steel or bronze; 3/8" rings of 14-gauge steel or bronze; or 1/4" rings of 16-gauge steel or bronze. Chain mail made of sturdy links that fails to meet the requirement of AR2 will be AR3, e.g. shark mail would fall into this category.

The strength of mail armor depends on the aspect ratio (ratio of ring inner diameter to wire diameter). For example, 12-gauge (SWG) steel is 0.104" wide, so the Aspect Ratio of a 12g 1/2" ring is (0.5)/(0.104) = 4.8. Doing the same for the other standards, we get:

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`12g (0.104") 1/2" ring 4.8 aspect ratio`

14g (0.080") 3/8" ring 4.7 aspect ratio

16g (0.064") 1/4" ring 3.9 aspect ratio

18g (.0480") not given, even though it's legal for metal armor!

That last jump from 4.7 to 3.9 is huge. If we adopt an aspect ratio of 4.8 as the standard, to avoid making current armor illegal, it would look like this:

Butted Mail

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`12g rings could be 0.499" or smaller: 1/2" (0.5") or 12.7mm`

14g rings could be 0.384" or smaller: 3/8" (.375") or 9.8mm

16g rings could be 0.307" or smaller: 5/16" (.312") or 7.8mm

18g rings could be 0.230" or smaller: 3/16" (0.188") or 5.8mm

And that's just a standard for butted mail. Riveted mail is much stronger, so we could increase riveted mail to perhaps 7 or 7.5. I would like to add a "looser" standard for riveted mail because not only is it inherently stronger than butted, but it's also historically accurate and I wouldn't want to punish someone who takes the effort or expense to get riveted armor. Here's an example of historical-spec riveted mail. Using an aspect ratio of 7.5 for riveted mail would give this:

Riveted Mail

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`12g rings could be 0.780" or smaller: 3/4" (0.75") or 19.8mm`

14g rings could be 0.600" or smaller: 9/16" (.562") or 15.2mm

16g rings could be 0.480" or smaller: 7/16" (.438") or 12.2mm

18g rings could be 0.360" or smaller: 5/16" (0.312") or 9.1mm

Thoughts?