Speaking of Galadriel,

The Eldar of the Elder Days were also very tall. Galadriel, 'the tallest of all the women of the Eldar of whom tales tell' was said to be man-high, but it is noted 'according to the measure of the Dúnedain and the men of old', indicating a height of about six feet four inches.
Unfinished Tales; "The Disaster of the Gladden Fields: Appendix - Númenórean Linear Measures", p. 370.