The Lord of the Rings: Shadow of the East
No House of the Dwarves stands above that of Durin’s Folk. They are the oldest and noblest lineage, for they trace their line back to the first of the Seven Fathers, Durin I. Their ancient spirit, coupled with their role in history, makes Durin’s House the most experienced tribe, the first among jealous equals.
Physically, Durin’s Folk are no different than other Dwarves. Slanted tales citing their superior stature and strength are confined to the biased libraries of Khazad-dûm. They carry themselves with assurance and bearing, but this is not function of greater size.