Fit Image Size

[imperial]

How could I possible fit a 399x474 image size from this code?

css:
div.button { position:absolute; width:70px; height:24px; border:1px solid #FF9933;}
a.roll { width:90px; height:20px; text-align:center; display:block; background: url(pic.jpg);}

xhtml:

<div class="button"><a class="roll" href="#">Button</a></div>

[ray326]

In general you can't.