The ruler an individual makes differs to an inch ruler in the sense that they are totally different from sizes like inches, feet, centimeters.
A ruler can simply be defined as a tool or a device used to measure length and draw straight lines.
It also refers to a smooth-edged strip which could be of wood or metal that is usually marked off in units such as inches, centimeters, and is used as a straightedge or for measuring.
It can also be used to rule a paper.
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