Width

Width is how fat a shape is at its narrowest, the distance from one edge through the material to the opposite edge.

A wire that is too skinny may not print, may overheat, or may blow like a fuse. A device that is too narrow may not match the model. Foundries publish a minimum width per layer: perhaps 0.14 micrometer on a fine metal, and 0.5 millimeter on a cheap board copper. Wide power straps are a choice. Skinny signal traces are a limit. Measure a rectangle that is 0.14 µm by 4 µm and the width is 0.14. A bent path uses the stored width number unless a neck pinch makes a narrower waist.

The upper strap is thin. The lower strap is thick. Each thickness is measured across that strap alone.

Width travels with spacing. Fatness and gap are the pair most people meet first. Enclosure is the third sibling. A design-rule check reports width errors as skinny spots, including accidental slivers after a boolean or a bad merge. Centerline length is a different measurement. Length is how far the wire runs. Width is how fat it is.

Fatness, the gap, and the centerline are covered in width and space, design rules and DRC, and paths: centerlines with width.