I m importing one image in latex document. But caption has bigger font than my normal text on page. 

```
\documentclass{article}
\usepackage{graphicx}

\begin{document}

  Some text...

  \begin{figure}[htb]
  \begin{center}
  \includegraphics[height=1in,width=1in,angle=-90]{foo}
  \caption{This is a figure.}
  \end{center}
  \end{figure}

   More text...

  \end{document}

```

How to reduce the font size of caption and space between caption and image?