Vinyl and PVC sheeting is usually measured in mil, (or mm). For sheet steel, a guage converter (one of many, so caveat emptor!) is at http://www.efunda.com/designstandards/gages/sheet_forward.cfmAnonymous wrote:I see you have a link to a wire gauges chart. But what about vinyl, pvc, and steel sheet gauge thickness? I've been searching high and low for these charts.