Trunk diameters of 17 m (56 ft) have been claimed via research figures taken out of context.[9] The specimen known to have the greatest diameter at breast height is the General Grant tree at 8.8 m (28.9 ft).[10] Between 2014 and 2016, it is claimed that specimens of coast redwood were found to have greater trunk diameters than all known giant sequoias - though this has not been independently verified or affirmed in any academic literature.[11] The trunks of coast redwoods taper at lower heights than those of giant sequoias which have more columnar trunks that maintain larger diameters to greater heights.