\documentclass{article}
\begin{document}

\section{Normal roman font}

This is some text.  \emph{This text is emphasized}
\begin{itemize}
\item
Testing \verb#\Large# by {\Large roman text with {\normalsize normal sized text} in the middle}.
\item
Testing \verb#\Huge# by {\sf\Huge sans serif text with {\normalsize normal sized text} in the middle}.
\item
Testing \verb#\small# by {\sc\small small caps text with {\large large sized text} in the middle}.
\end{itemize}


\end{document}

