$(function () {
    $('select').each(function () {
        var $this = $(this);
        var options = $this.data('select2Options') || {};
        $this.select2(options);
    });
});
$(function () {
    $('select').each(function () {
        var $this = $(this);
        var options = $.extend({
            containerCss: {minWidth: '15em'},
            dropdownAutoWidth: true
        }, $this.data('select2Options') || {});
        $this.select2(options);
    });
});

set a minWidth on all select2 controls