Beamer foot frame numbers bigger

To make foot frame numbers bigger:

“You can set the page number in head/foot font; a little example using size=\large:


\documentclass{beamer}
\usepackage{xcolor}
\usetheme{Goettingen}
\useinnertheme{circles}

\beamertemplatenavigationsymbolsempty

\setbeamerfont{page number in head/foot}{size=\large}
\setbeamertemplate{footline}[frame number]

\begin{document}

\frame{
\frametitle{test}
test
}
\end{document}

That’s it”

(http://tex.stackexchange.com/questions/74241/frame-number-in-beamer)