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ADAAG Manual

Note: This document, portion of document or referenced document was published prior to the 2010 ADA Standards, and all or part of this information may only apply to Safe Harbored elements.

Character Proportion [4.30.2]

Very thick or thin characters and character strokes can be difficult to read. Recommendation: While ADAAG does not specify the character to use in calculating proportions, SEGD recommends the capital "O" and number "0" for character proportion and the capital "I" and number “1" for stroke proportion as adequately representative of letterforms.

Diagram showing character proportions

Recommendations: Styles with "simple" or no serifs (required for raised letters) are preferred over styles, such as script or old English, that can be difficult to read. Consider uniform stroke widths which can make signs easier to read.

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