<table class="wikitable">
<tr>
<th colspan="1">Persian unit</th>
<th>Persian name</th>
<th>Relation to previous unit</th>
<th><a href="//en.wikipedia.org/wiki/Metric_system" title="Metric system">Metric</a> Value</th>
<th>Imperial Value</th>
</tr>
<tr>
<td>finger</td>
<td align="right"><i>aiwas</i></td>
<td align="right"></td>
<td>≈ 20 mm</td>
<td>≈ 0.8 <a href="//en.wikipedia.org/wiki/Inch" title="Inch">in</a></td>
</tr>
<tr>
<td>hand</td>
<td align="right"><i>dva</i></td>
<td align="right">5 <i>aiw