Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
General Sherman (tree)
Table title:
Dimensions
Table:
<table id='hittask' contenteditable='False'>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Height above base </th><td colspan=1 rowspan=1 > 274.9 ft </td><td class="highlighted"  colspan=1 rowspan=1 > 83.8 m </td></tr>
<tr> <th colspan=1 rowspan=1 > Circumference at ground </th><td colspan=1 rowspan=1 > 102.6 ft </td><td colspan=1 rowspan=1 > 31.3 m </td></tr>
<tr> <th colspan=1 rowspan=1 > Maximum diameter at base </th><td colspan=1 rowspan=1 > 36.5 ft </td><td colspan=1 rowspan=1 > 11.1 m </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Diameter 4.50 ft (1.37 m) above height point on ground </th><td colspan=1 rowspan=1 > 25.1 ft </td><td class="highlighted"  colspan=1 rowspan=1 > 7.7 m </td></tr>
<tr> <th colspan=1 rowspan=1 > Girth Diameter 60 ft (18 m) above base </th><td colspan=1 rowspan=1 > 17.5 ft </td><td colspan=1 rowspan=1 > 5.3 m </td></tr>
<tr> <th colspan=1 rowspan=1 > Diameter 180 ft (55 m) above base </th><td colspan=1 rowspan=1 > 14.0 ft </td><td colspan=1 rowspan=1 > 4.3 m </td></tr>
<tr> <th colspan=1 rowspan=1 > Diameter of largest branch </th><td colspan=1 rowspan=1 > 6.8 ft </td><td colspan=1 rowspan=1 > 2.1 m </td></tr>
<tr> <th colspan=1 rowspan=1 > Height of first large branch above the base </th><td colspan=1 rowspan=1 > 130.0 ft </td><td colspan=1 rowspan=1 > 39.6 m </td></tr>
<tr> <th colspan=1 rowspan=1 > Average crown spread </th><td colspan=1 rowspan=1 > 106.5 ft </td><td colspan=1 rowspan=1 > 32.5 m </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Estimated bole volume </th><td colspan=1 rowspan=1 > 52,508 cu ft </td><td class="highlighted"  colspan=1 rowspan=1 > 1,487 m3 </td></tr>
<tr> <th colspan=1 rowspan=1 > Estimated mass (wet) (1938) </th><td colspan=1 rowspan=1 > 2,105 short tons </td><td colspan=1 rowspan=1 > 1,910 t </td></tr>
<tr> <th colspan=1 rowspan=1 > Estimated bole mass (1938) </th><td colspan=1 rowspan=1 > 2,472,000 lb </td><td colspan=1 rowspan=1 > 1,121 t </td></tr>
</table>
Question:
What are the characteristics of General Sherman? 
Answer:
General Sherman has a height of 83.8 meters, a diameter of 7.7 m, and an estimated bole volume of 1,487 m³.