text-align: right on <select> or <option>

You could try using the "dir" attribute, but I'm not sure that would produce the desired effect?

<select dir="rtl">
    <option>Foo</option>    
    <option>bar</option>
    <option>to the right</option>
</select>

Demo here: http://jsfiddle.net/fparent/YSJU7/

The best solution for me was to make

select {
    direction: rtl;
}

and then

option {
    direction: ltr;
}

again. So there is no change in how the text is read in a screen reader or and no formatting-problem.

The following CSS will right-align both the arrow and the options:

select { text-align-last: right; }
option { direction: rtl; }

<!-- example usage -->
Choose one: <select>
  <option>The first option</option>
  <option>A second, fairly long option</option>
  <option>Last</option>
</select>