Double Square icon

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24"><g fill="none" stroke="currentColor" stroke-width="1.5"><rect width="18.5" height="18.5" x="2.75" y="2.75" rx="6"/><rect width="9" height="9" x="7.5" y="7.5" rx="3"/></g></svg>