What you're looking for is transform:scale(x, y)
. For example:
-webkit-transform:scale(2.0, 1.0);
-moz-transform:scale(2.0, 1.0);
-ms-transform:scale(2.0, 1.0);
-o-transform:scale(2.0, 1.0);
transform:scale(2.0,1.0);
You kind of have to specify it for all the browsers, at least for now.
Edit:
I forgot to link my jsfiddle.