Abbreviations and Symbols

If you specify a unit of measure and use an abbreviation or a symbol, always use a numeral with it – do not spell the number out.

• 5 mi
• 6 h
• 16 mm movies
• He is 6’9″ tall

For two or more quantities, the abbreviation or symbol is repeated if it is closed up to the number but not if it is separated.

• 10%-25%
• 32°F-212°F
• 3 x 5 cm
• 2 x 6 in