[Tex/LaTex] Line spacing with mixed font sizes in itemize environment

Question

I'd like to mix in footnote-sized text with normal-sized text in beamer. The problem is that when I use \footnotesize the line spacing still corresponds to \normalsize spacing. Here's a minimal sample document demonstrating the problem:

\documentclass{beamer}
\begin{document}
\begin{frame}{Line spacing for footnote-sized text in itemize environment}
Problem: footnote-sized text still has normal-sized line spacing.
    \begin{itemize}
    \item The problem is below:\\    
 \footnotesize This is some footnote-sized text. When it wraps around it still has normal-sized line spacing.
 \normalsize
    \item Some other items for comparison
    \item I would like the footnote-sized text to have single spacing relative to the footnote size. 
    \end{itemize}
\end{frame}
\end{document}

I was hoping to use the footnote-sized text to write parenthetical comments in a way which visually distinguishes them from the main items in the list.

Answer 1

\documentclass{beamer}
\begin{document}
\begin{frame}{Line spacing for footnote-sized text in itemize environment}
Problem: footnote-sized text still has normal-sized line spacing.
    \begin{itemize}
    \item The problem is below:

    {\footnotesize This is some footnote-sized text.
When it wraps around it still has normal-sized line spacing.\par}

    \item Some other items for comparison
    \item I would like the footnote-sized text to have single spacing relative to the footnote size.
    \end{itemize}

    {\footnotesize This is some footnote-sized text.
When it wraps around it still has normal-sized line spacing.\par}

\end{frame}
\end{document}

When a font size changing command is issued, a \par (or an empty line) before the end of the text should be used.