<ul> <li>foo</li> <li>bar</li> <li>baz</li> <li>qux</li> <li>quxx</li> </ul>
ul { width: 130px; margin: 10px; padding: 5px; background-color: #CCC; font-size: 0; text-align: justify; } ul::after { content: ''; display: inline-block; width: 100%; } li { display: inline-block; padding: 5px; background-color: black; color: white; font-family: sans-serif; font-size: 20px; }