LaTeX Font Warning: Font shape `OT1/cmss/m/n' in size <4> not available
LaTeX Font Warning: Size substitutions with differences

I am using the files from http://www.poirrier.be/~jean-etienne/info/latexbeamer/latex-beamer.tar.gz.

Alternatively, for a minimal working example, the presentation




produces the warnings.

How to remove the above 2 warnings?


4 Answers 4




to your document preamble.

Fonts are typically available only in certain sizes/increments. As an example, the basic article document class loads only the following sizes (from size10.clo):

  • \tiny @ 5pt;
  • \scriptsize @ 7pt;
  • \footnotesize @ 8pt;
  • \small @ 9pt;
  • \normalsize @ 10pt;
  • \large @ 12pt;
  • \Large @ 14.4pt;
  • \LARGE @ 17.28pt;
  • \huge @ 20.74pt; and
  • \Huge @ 24.88pt

So, requesting a 15pt font size using something like

\fontsize{15}{18}\selectfont Hello world.

leads to LaTeX complaining in the .log file:

LaTeX Font Warning: Font shape `OT1/cmr/m/n' in size <15> not available
(Font)              size <14.4> substituted on input line 3.
LaTeX Font Warning: Size substitutions with differences
(Font)              up to 0.6pt have occurred.

Using lmodern removes this restriction by allowing font sizes at arbitrary sizes. For more on font size requirements, see Fonts at arbitrary sizes.

  • 5
    I know this workaround, but I also know that if you do that, math accents will be typesetted very badly. You can try i.e. $\ddot u$ or $\tilde J$
    – Wauzl
    Commented Oct 17, 2012 at 7:44
  • 2
    I used package lmodernand it worked fine until I used \scshape and no matter the size I still get the same error. Any ideas? Commented Jun 4, 2014 at 14:22
  • 1
    @VagelisBebelis: Where are you using \scshape? Perhaps with a bold or italics font? They don't have small-caps included.
    – Werner
    Commented Jun 4, 2014 at 16:23
  • 4
    @AlexanderGelbukh: That's because lmodern only replaces the Computer Modern font family, not all fonts.
    – Werner
    Commented Aug 7, 2017 at 17:29
  • 2
    @Werner Perhaps you could clarify this in the answer. Commented Aug 12, 2017 at 8:45

Add \usepackage{anyfontsize} to your preamble.

  • 7
    This is what worked for me. With lmodern suggested in the accepted answer, I stil got the warning LaTeX Font Warning: Font shape 'U/lasy/m/n' in size <13> not available. Commented Aug 7, 2017 at 5:32
  • 4
    This scales all fonts, which is a reasonable fallback; but one should first fix warnings by selecting better fonts (like lmodern) where possible. Commented Aug 29, 2017 at 13:30
  • 1
    Using anyfontsize worked for me when using this thesis template latextemplates.com/template/masters-doctoral-thesis. Using lmodern did nothing (regardless of whether anyfontsize was included or not).
    – amc
    Commented Feb 24, 2022 at 19:23
  • This worked for me, whereas lmodern didn't.
    – Mohamed
    Commented Apr 3 at 8:38
  • This is what worked for me as well!
    – ball_jan
    Commented Apr 27 at 14:46

You can add this \let\Tiny=\tiny just after the documentclass declaration. So, it should look something like this:


Hope this helps! :)

Links: [1] http://texblog.net/latex-archive/presentations/beamer-warnings/


Beamer versions 3.44 and newer no longer produce this warning.

It was fixed in https://github.com/josephwright/beamer/commit/3bac00a7a4d95067ccb6e6aac0f0be1c9f802a1a

  • Nope, installed a new version today (May 20, 2020), and it still has this warning.
    – mathreader
    Commented May 21, 2020 at 6:40
  • 1
    @mathreader Something's fishy. I never had the warning since the update, and I just tested it again (just to be sure).
    – campa
    Commented Aug 13, 2020 at 15:24

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