Do you really know how to measure?

' This article contains opinion. You can take or leave it at your own peril. '

Of course you know how to measure things! Does the writer think you're stupid??? Why is the writer being an ass??? Because if were never taught to properly measure things, you don't really know how. Sure, in a lot of cases, "close enough" is good enough. But "close enough" doesn't work when you are measuring stamps and using fractions of millimeters. And millimeters is what all philatelic references use to measure things. If you had a STEM education, then you know how important very accurate measurement is since you are still alive and can skip to the perf measurement section.

General measurement
When measurements are given for stamps, it is the stamp design and not the overall size that is being measured.

Measuring perfs
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