Aragorn was the tallest of the Company, but Boromir, little less in height, was broader and heavier in build. He led the way, and Aragorn followed him. Slowly they moved off, and were soon toiling heavily. In places the snow was breast-high, and often Boromir seemed to be swimming or burrowing with his great arms rather than walking.

Book 2, Chapter 3 The Ring Goes South