th.svg 287 Bytes
<svg xmlns="http://www.w3.org/2000/svg" id="flag-icon-css-th" viewBox="0 0 640 480">
  <g fill-rule="evenodd">
    <path fill="#f4f5f8" d="M0 0h640v480H0z"/>
    <path fill="#2d2a4a" d="M0 162.5h640v160H0z"/>
    <path fill="#a51931" d="M0 0h640v82.5H0zm0 400h640v80H0z"/>
  </g>
</svg>