JSFiddle - React, Tailwind, and code Playground

HTML

<select id="test">
    <option>Size 9</option>
    <option>Size 14</option>
    <option>Size 8</option>
    <option>Size 11</option>
</select>

JavaScript

$("#test").html($("#test option").sort(function (a, b) {
    var a = parseInt(a.text.match(/\d+/),10), b = parseInt(b.text.match(/\d+/),10);
    return a < b ? -1 : 1;
}));