Grid 3x3

<svg class="bi bi-grid-3x3" width="1em" height="1em" viewBox="0 0 16 16" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
  <path fill-rule="evenodd" d="M0 1.5A1.5 1.5 0 0 1 1.5 0h13A1.5 1.5 0 0 1 16 1.5v13a1.5 1.5 0 0 1-1.5 1.5h-13A1.5 1.5 0 0 1 0 14.5v-13zM1.5 1a.5.5 0 0 0-.5.5V5h4V1H1.5zM5 6H1v4h4V6zm1 4V6h4v4H6zm-1 1H1v3.5a.5.5 0 0 0 .5.5H5v-4zm1 0h4v4H6v-4zm5 0v4h3.5a.5.5 0 0 0 .5-.5V11h-4zm0-1h4V6h-4v4zm0-5h4V1.5a.5.5 0 0 0-.5-.5H11v4zm-1 0H6V1h4v4z"/>
</svg>