I want to play a joke on a coworker, and what I need is a ruler that looks real, but that is slightly off, such that all her measurements will be off.
It needs to be only slightly wrong, maybe a quarter inch short out of a dozen (or else it won't be believable).
Does such a rule exist?
Must be. That's the only explanation for all the half-ass carpenter work that you see, right?
Starrett makes such rules. They're called shrink rules and are designed for pattern-making.
For example:
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