Nasa chainmail (4x4, 8x8, 12x16 and 32x34)

Note: the coned center section design saves print time (prior design required individual deposition points for 12 tiny dots that often failed, but that are eliminated here) and provides the strength needed to eliminate the vertical links

Printing at either 0.15mm or 0.20mm layer height works great

I've uploaded a few sizes to save time and allow you to find one that fits your printer. :-)

Original model: https://www.thingiverse.com/thing:3095799/