Size of select box in Twitter Bootstrap

Question

I'm using Twitter Bootstrap. Select boxes are always narrower than input boxes.

How can I make them the same width? Adding padding helps, but it looks ugly.

EDIT

Here is a little example - http://jsfiddle.net/DfY8z/2/
Same example with custom class applied - http://jsfiddle.net/DfY8z/3/

I can use classes like span3, span4 etc. But I want my inputs to fill all available space (and to be the same size) so I'm using custom class.

Answer 1

Just adding input-sm class just next to the form-control worked for me.

<select class="form-control input-sm" id="xxx" ... >

Answer 2

<input type="text" value="" name=""><br>
<select>
 <option>Some options which is very very long... </option>
</select>

The result is the exact size of the boxes.