Apparently I have taken it upon myself to knit another set of chainmail. This evening, I absolutely could not resist dropping this chunk (which at the moment is just about six inches across; this is just a subset of it) into my photo box. I find the proportion of rings at this wire gauge and diameter particularly pleasing for whatever reason.
"Designed" is a strong word. I crank these out, literally, on a wire winding jig that I made out of scrap wood and bits of steel rod a couple of decades ago. Since these are aluminum and I wouldn't drive myself bats doing so, I cut the rings off of the coils using a jeweler's saw. (You can do this with steel wire if you really want to, but it takes forever and you'll burn through a lot of saw blades. Most people just use wire cutters to make steel rings, which are uglier but the process consumes significantly less of your life.)