Google site search

I've just installed the code for Google site search (part of the
Adsense program). But the search box runs completely off the right
edge of my blog sidebar & is only half visible. Someone suggested the
'Size' setting should be decreased from 31. I tried that & it didn't
work.

Can anyone tell me how I can make the box shorter in length so it'll
fit:

<!-- SiteSearch Google -->
<form method="get" action="http://www.google.com/custom" target="_top">
<table border="0" bgcolor="#cccccc">
<tr><td nowrap="nowrap" valign="top" align="left" height="32">
<a href="http://www.google.com/">
<img src="http://www.google.com/logos/Logo_25gry.gif"
border="0" alt="Google"></img></a>
</td>
<td nowrap="nowrap">
<input type="hidden" name="domains"
value="richardsilverstein.com"></input>
<input type="text" name="q" size="31" maxlength="255" value=""></input>
<input type="submit" name="sa" value="Search"></input>
</td></tr>
<tr>
<td>&nbsp;</td>
<td nowrap="nowrap">
<table>
<tr>
<td>
<input type="radio" name="sitesearch" value=""
checked="checked"></input>
<font size="-2" color="#000000">Web</font>
</td>
<td>
<input type="radio" name="sitesearch"
value="richardsilverstein.com"></input>
<font size="-2" color="#000000">richardsilverstein.com</font>
</td>
</tr>
</table>
<input type="hidden" name="client"
value="pub-3322483369336252"></input>
<input type="hidden" name="forid" value="1"></input>
<input type="hidden" name="ie" value="ISO-8859-1"></input>
<input type="hidden" name="oe" value="ISO-8859-1"></input>
<input type="hidden" name="cof"
value="GALT:#0066CC;GL:1;DIV:#999999;VLC:336633;AH :center;BGC:FFFFFF;LBGC:FF9900;ALC:0066CC;LC:0066C C;T:000000;GFNT:666666;GIMP:666666;FORID:1;"></input>
<input type="hidden" name="hl" value="en"></input>
</td></tr></table>
</form>
<!-- SiteSearch Google -->