As per Anthony's request, I decided to whip up some chainmaille after lunch and before I started working on the cryptex. Here's the results.
So, no, I didn't make this today. I made this a number of years ago just for fun. Both the shortened hauberk and coif are made out of 16 gauge galvanized steel (hand wound and cut, of course. Medieval people didn't have power tools). The trim on the coif is made from 16 gauge copper wire. It took about a month to make, and cost, I'd say, around $50 in raw materials, which is pretty good. My only regret is that the chainmaille is made of just butted rings, rather than riveted ones. The complication comes from using galvanized wire, which is covered with a zinc oxide sacrificial layer to prevent corrosion, and when you anneal the rings for riveting, the coating sublimes and turns into a variety of toxic gases (http://www.jtbaker.com/msds/englishhtml/z3705.htm). Chemistry!
And contrary to popular belief, chainmaille isn't meant to guard against cutting. Most gauges used (even historically) were too thin to prevent a sword blow if stretched taught. Chainmaille is supposed to hang, like a curtain. The hanging absorbs the blows of blunt force, like ancient Kevlar (Physics!) since it's much harder to treat internal bleeding than an external laceration (Biology!). Yeah, this is still a Science and Engineering blog, don't worry.