14g copper on the left 18g aluminum on the right

double double pattern on the top, Inca Puno pattern on the bottom

The type of chain you make is basically dependent on two features the thickness of the wire, and the size of the thing you wrap it around (mandrel). If your wire is too thick, or your mandrel too small you wouldn’t be able to do a complicated pattern (like the aluminum chain above), similarly if your wire is too thin, or mandrel too big your chain will be all floppy and not look good.