<tr style="background-color:#CCCCCC;"><th>Class</th><th colspan="2">A Series (x × y in mm)</th><th colspan="2">B Series (x × y in mm)</th><th colspan="2">C Series (x × y in mm)</th><th colspan="2">D Series (x × y in mm)</th><th>German alternative name (Usage)</th></tr><tr><td> 4×</td><td>1682</td><td> 2378 </td><td>2000</td><td>2828</td><td>. </td><td>.</td><td>. </td><td>.</td><td></td></tr><tr><td> 2×</td><td>1189</td><td> 1682 </td><td>1414</td><td> 2000 </td><td>. </td><td>.</td><td>. </td><td>.</td><td></td></tr>