Nobody knows Jesus appearance for sure since there has been no record made. Artists therefore can only depict what a man from that region probably looked like from their imaginations. Jehovah's Witness illustrations are probably closer to the historical reality than classical images of a fair skinned, light haired invidual. Given he was for most of his adult life a manual worker and as a carpenter would have had at the time to actually fell trees and transport timber, it is also likely he was not phyiscally slight, and emasiated but a relatively robust individual.