system/icons/usericons/guest.svg
<svg width="128mm" height="128mm" viewBox="0 0 128 128" xmlns="http://www.w3.org/2000/svg"><defs/><path d="M64 47a63 80 0 00-63 80h126a63 80 0 00-63-80z" fill="gray" stroke="#000" stroke-width="2"/><circle cx="64" cy="24" fill="gray" stroke="#000" stroke-width="2" r="23"/><circle cx="53" cy="17" r="3"/><circle cx="75" cy="17" r="3"/></svg>