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Multiplexed, Duplexed, or Uniwidth

A multiplexed, duplexed, or uniwidth typeface is a font category where every weight variation occupies the same horizontal footprint. This differs from conventional typefaces, where heavier weights naturally expand and take up more layout space.

The word “uniwidth” set twice in blue Fabric Grotesk, light above and heavy bold below, each sitting on its own grey rule — and two thin pink vertical rules marking that both settings begin and end at exactly the same point, so the line length does not change when the weight does.

A multiplexed, duplexed, or uniwidth typeface is a unique category of font where every available weight variation occupies the exact same amount of horizontal footprint. This design approach diverges sharply from conventional typefaces, where selecting a heavier weight naturally causes the characters to expand outward and consume more layout space.

These synchronized-width font families are highly advantageous in interactive layouts where character thicknesses shift dynamically based on user actions, such as in digital interface design when an on-screen button transitions to a bold weight during a cursor hover. Because the character boundaries maintain identical dimensions across different weights, the overall physical boundary of the button remains perfectly static, preventing awkward layout shifting between states.

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About the author
Iveta Stoyanova

Iveta is the Social Media & Community Manager at Fontfabric. With a background in Rhetoric & Speech Communication, she writes about the human side of typography, the inspiration behind new typefaces, choosing the right font for your project, and font licensing.