<html> <head> <style type='text/css' media='all'> table { margin: auto; } td { background: #ccc; margin: 10%; border: 5px solid black; padding: 10%; width: 100%; color: black; font-size: 200%; text-align: center; } </style> </head> <body> <table> <tr> <td> Some content. </td> </tr> </table> </body> </html>