Trying to change select option text on hover

Trying to change select option text on hover

I have a fiddle


I want to change the text size on a hover, but I dont think I have the correct selector ...What am I doing wrong?

<select id="ID1">
<option value="One Thousand">1000</option>
<option value="Two Thousand">2000</option>
<option value="Three Thousand">3000</option>
<option value="Four Thousand">4000</option>
<option value="Five Thousand">5000</option>
</select>

$("#ID1 option").hover(function () {
    $(this).css("font-size", "20px");
    });

$("#ID1 option").blur(function () {
    $(this).css("font-size", "20px");
});