“By then Ser Gregor Clegane was in position at the head of the lists. He was huge, the biggest man that Eddard Stark had ever seen. Robert Baratheon and his brothers were all big men, as was the Hound, and back at Winterfell there was a simpleminded stableboy named Hodor who dwarfed them all, but the knight they called the Mountain That Rides would have towered over Hodor. He was well over seven feet tall, closer to eight, with massive shoulders and arms thick as the trunks of small trees. His destrier seemed a pony in between his armored legs, and the lance he carried looked as small as a broom handl”
Book:A Game of Thrones