shrink the size of Button

[swati cha]

Hi all,

I want to shrink the size of the button can any one give me an idea
<a id="helpLinkID" class="linkButtonArrow">
<span class="buttonLeftArrowCap">   </span>
<span class="buttonMiddleArrow"> ${msgs.helpPB} </span>
<span class="buttonRightQuestionMark">  </span>
</a


Thanks in advance