<!DOCTYPE html>
<style>
td {
  width: 50.6px;
  height: 50.3px;
  background: yellow;
  padding: 0;
  border: 1px solid blue;
}
</style>
<table style="border-collapse: collapse">
  <tr>
    <td></td><td></td><td></td>
  </tr>
  <tr>
    <td></td><td></td><td></td>
  </tr>
</table>
