chromium/third_party/blink/web_tests/svg/custom/resources/object-sizing-width-50p-height-50p.svg

<svg xmlns="http://www.w3.org/2000/svg" width="50%" height="50%">
    <rect x="0" y="0" width="100%" height="100%" fill="lightblue"/>
    <rect x="5%" y="5%" width="90%" height="90%" fill="green"/>
</svg>