How to change the width of select box

How to change the width of select box in jquery or i开发者_运维问答n html?

In HTML

<select name="foo" style="width:30px;">
    <option>one</option>
    <option>two</option>
    <option>three</option>
</select> 

In Jquery

$('#Id').width(30);

use css().

$('select').css({'width': 200});

One option is to use width

$('#selectId').width(175);