He is exceptionally tall and strong. Howard is never explicit in his stories, but in a
letter to
P. Schuyler Miller he wrote:
At Vanarium he was already a formidable antagonist, though only fifteen. He stood six feet [1.83 m] and weighed 180 pounds [82 kg], though he lacked much of having his full growth.
Conan's height and weight as an adult are subject to speculation - some estimates make him 6' 6" (1.98 m) and up to 250 lb (113 kg) - but extrapolating the growth of the 15-year-old Conan based on modern data would make him at least 6' 2" (1.88 m) and 215 lbs (98 kg) at 18. This tallies with a comment Howard wrote in another letterhow his crusader character,
Cormac Fitzgeoffrey, is a double of Conan and that Cormac is 6' 2" and 215 pounds. It is also of note that the blade of Conan's sword is described as being 5 feet long, likely making for a 6 foot sword including the grip, in the earlier story, "
The Scarlet Citadel". He uses it with one hand as well as both hands with ease, therefore it is possible that Howard imagined him quite taller at the character's beginning. Or simply he used different swords during his adventures.
In Howard's tales, no human is ever described as stronger than Conan, although several are mentioned as taller (such as the strangler
Baal-Pteor) or of larger bulk.