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3.7: Font Size

  • Page ID
    202608
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    In this section, we review the two main concerns regarding font size on the web.

    What is font size?

    Font size is the size of text visible on the screen.

    Who are you doing this for?

    This work supports students who:

    • Are blind or have low vision, like Diana
    • Have a form of cognitive disability
    • Are deaf or hard of hearing
    • Have a physical disability

    Diana has poor vision and needs enlarged text or uses text-to-speech software.


    What do you need to do?

    There are two main concerns when working with font sizes:

    1. Ensuring that default font sizes are not too small.
    2. Ensuring that text can be expanded to 200% on websites.[1]

    Keep in mind these recommendations and guidelines:

    • Use 12 point for body text. For most documents, body text should be around 12 points. Small fonts may be illegible for some audiences.
    • Use 9 point for footnotes. If a document contains footnotes or endnotes, the minimum size should be 9 points.
    • The Web Content Accessibility Guidelines (WCAG 2.0) recommend ensuring that text can be zoomed to 200%. As well, we recommend using liquid layouts[2] that can accommodate 200% text.

    Readability on LibreTexts

    In the traditional viewing mode LibreTexts has a tab for Readability in the blue bar at the far left of every page that allows adjusting the size of text, the margins and the mode for viewing. In the new Reader View mode the size of text can be adjusted using <cntl>+/-.

    clipboard_eee68fa9d1510832b63b51ed8a7e364d9.png
    Figure \(\PageIndex{1}\): Readability adjusments

    Media Attributions


    1. "Font Size on the Web," Accessibility and Usability at Penn State, accessed April 17, 2018, http://accessibility.psu.edu/fontsizehtml/.
    2. Liquid layout are layouts that are based on percentages of the current browser window's size. They flex with the size of the window, even if the current viewer changes their browser size as they're viewing the site. Liquid width layouts allow a very efficient use of the space provided by any given web browser window or screen resolution.

    3.7: Font Size is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by LibreTexts.

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