DIMENSIONS 30 H x 24 W. THE SIGNATURE APPEARS TO READ, V CANSLER FRANCISCO? What they lack in height, however, they make up for in size, usually outweighing giant redwoods substantially. This species includes the tallest living trees on Earth, reaching up to 115.9 m (380.1 ft) in height (without the roots) and up to 8.9 m (29 ft) in diameter at breast height.