Click here - Printable US / Metric Ruler (PDF)
Printable US and Metric ruler to use in a pinch or to affix to your workbench.
Make sure to set the scaling to 'Actual Size' and print in normal 'Portrait' mode (shown in red). Please verify scale using a coin (or ruler if you have one). You can fold the edge over or cut ruler out if needed.
Lots of info included in printout. Ruler along with common US and Metric size charts for Metric M3 to M12 screws and washers and US / Inch #4 to 5/16" screws and washers. US / Inch Ruler Key included that breaks out all of the inch hashmarks (1/16", 1/8", 1/4", 1/2", 3/4" up to 15/16").