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I'm writing a paper that requires the section titles to be in 12pt font, I can get the title to be in 12pt using:

\section{\fontsize{12}{15}\selectfont Introduction}

but the section number does not change size, is there a way to do this?

I've also tried looking at titlesec but have not been able to find any suitable examples.

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marked as duplicate by Werner, Kurt, Thorsten, Gonzalo Medina, Martin Schröder Mar 19 '13 at 17:50

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Welcome to TeX.sx! You should look up the titlesec package, which makes it easy to customise the formatting of section-unit titles. – Jubobs Mar 19 '13 at 16:56
3  
    
Thanks Werner, couldn't find that when searching. – andy mcevoy Mar 19 '13 at 17:53
up vote 21 down vote accepted

Here's one possibility using the sectsty package:

\documentclass{article}
\usepackage{sectsty}

\sectionfont{\fontsize{12}{15}\selectfont}

\begin{document}

\section{Test Section}
test

\end{document}

The titlesec package could also be used:

\documentclass{article}
\usepackage{titlesec}

\titleformat{\section}
  {\normalfont\fontsize{12}{15}\bfseries}{\thesection}{1em}{}

\begin{document}

\section{Test Section}
test

\end{document}

enter image description here

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1  
This is helpful to see how to set the font size to a specified pt size. – stvn66 Jun 2 '15 at 13:38

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