You can set your own width, border thickness and background color. You can also determine the width of each column by adding width= to the <td> tag of the column.
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<table border=2 width=50% cellspacing=5 cellpadding=8 bgcolor=cyan>
<tr><td>one</td></tr>
<tr><td>two</td></tr>
</table>
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<table border=2 width=50% cellspacing=5 cellpadding=8 bgcolor=cyan>
<tr><td>one</td></tr>
<tr><td>two</td></tr>
<tr><td>three</td></tr>
</table></center>
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<table border=2 width=50% cellspacing=5 cellpadding=8 bgcolor=cyan cols=2>
<tr><td>one</td><td>two</td></tr>
</table>
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<table border=2 width=50% cellspacing=5 cellpadding=8 bgcolor=cyan cols=2>
<tr><td>one</td><td>two</td></tr>
<tr><td>three</td><td>four</td></tr>
</table>
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<table border=2 width=50% cellspacing=5 cellpadding=8 bgcolor=cyan cols=2>
<tr><td>one</td><td rowspan=2>two</td></tr>
<tr><td>three</td></tr>
</table>