Definition
A typographic unit of measurement equal to the width of the letter 'M' in any given font size—the designer's secret weapon for maintaining proportional spacing that actually looks professional instead of like a ransom note.
Example Usage
Set the padding to 2 ems to ensure consistent spacing across all responsive breakpoints.
Source: Typography and web design terminology
Related Terms
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See “ems” in Corporate Speak, Gen-Z Slang, Pirate Speak, and more.
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