Test piece designed to examine rule checking but is not manufacturable.
Bottom row has square "wires" ranging from 0.1mm to 2.5mm on a side with aspect ratios of 1:1. Other rows stretch these wires to have different aspect ratios of 2:1, 3:1, and 4:1 to examine transitioning between wires and walls.
7 w x
4 d x
2.756 w x
1.575 d x