If you are reading at this post, it’s because you already know the problem,…. so the javascript (jquery) solution to avoid options has the same widht as the select is:

jQuery(document).ready(function($) {
    
    $("xXxxXxXx select").hover(
        function(){
        $(this)
        .data("origWidth", $(this).css("width"))
        .css("width", "auto");        
        },function(){
        $(this).css("width", $(this).data("origWidth"));
    });

});