How to measure the minimum height of font characters as a sign builder or manufacturer

This document is only intended for sign builders and manufacturers. If you are a drop shipper, refer to this article.

Q: When specifying the height of the smallest letter, shall we exclude symbols and characters? Symbols like _ (underline) or . (period) usually takes the minimum height in all typefaces.

A: Yes, symbols and other similar characters should be excluded.

Q: When specifying the minimum height of the smallest letter, shall we just measure every letter, regardless of whether it's an upper or lower case?

A: Yes if you can. Usually, it would be the lowercase letter but some fonts will have only uppercase letters, so it should be adjusted accordingly.

Q: When it says "smallest". does it mean shortest, most narrow or takes the least amount of space as a whole?
A: It should be the shortest; we’re only looking at the height for this measurement.

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