JSFiddle - React, Tailwind, and code Playground

HTML

<select id="selecao">
    <option value="https://pay.google.com/about/static/images/social/og_image.jpg">1024x768</option>
    <option value="http://www.site.com/img/dois.jpg">1280x800</option>
    <option value="http://www.site.com/img/tres.jpg">1280x1024</option>
    <option value="http://www.site.com/img/quatro.jpg">1600x1200</option>
    <option value="http://www.site.com/img/cinco.jpg">1900x1200</option>
</select>

<a href="#"id="baixar">Enviar</a>

JavaScript

$('a#baixar').bind('click',function(){
    window.open($('select#selecao').val());
});