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How small can the letters be for a Braille sign? Must we use CAPITAL letters?

April 26, 2017braille Capital letters small

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How small can the letters be for a Braille sign? Must we use CAPITAL letters?

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The characters must be in capital letters. Here is an excerpt from the ADA rules (section 4.30.4 ): Letters and numerals shall be raised 1/32 in, upper case, sans serif or simple serif type and shall be accompanied with Grade 2 Braille. Raised characters shall be at least 5/8 in (16 mm) high, but no higher than 2 in (50 mm). Pictograms shall be accompanied by the equivalent verbal description placed directly below the pictogram. The border dimension of the pictogram shall be 6 in (152 mm) minimum in height.