Jamieson, Fausset and Brown on 2 Samuel 14:25-26

25-26. But in all Israel there was none to be so much praised as Absalom for his beauty--This extraordinary popularity arose not only from his high spirit and courtly manners, but from his uncommonly handsome appearance. One distinguishing feature, seemingly an object of great admiration, was a profusion of beautiful hair. Its extraordinary luxuriance compelled him to cut it "at every year's end;" lit., "at times," "from time to time," when it was found to weigh two hundred shekels--equal to one hundred twelve ounces troy; but as "the weight was after the king's shekel," which was less than the common shekel, the rate has been reduced as low as three pounds, two ounces [Bochart], and even less by others.