chromium/third_party/blink/web_tests/css2.1/20110323/resources/red-intrinsic-width-ratio.svg

<!-- only intrinsic ratio and width -->
<svg xmlns="http://www.w3.org/2000/svg"
     width="40" viewBox="0 0 4 6">
  <rect width="100%" height="100%" fill="red"/>
</svg>