<!DOCTYPE html>
<html>
<head>
<style>
table {
border: 1px solid #666;
table-layout: fixed;
width: 180px;
}
th,
td {
border: 1px solid #666;
width: 90px;
overflow: hidden;
}
</style>
</head>
<body>
<table>
<tr>
<th>header 1235466549845</th>
<th>header 2, Lorem Ipsum</th>
</tr>
<tr>
<td>Some text</td>
<td>This is a loooooooooooooooong text for exampeeeeeeeele</td>
</tr>
</table>
</body>
</html>