A single ostrich egg is equivalent to two dozen chicken eggs. Ostrich eggs typically weigh between 3½ and 5 pounds. In contrast, chicken eggs weigh between 1¼ and 2½ ounces.
As of May 2008, the largest ostrich egg on record weighed 5 pounds, 11 ounces. Ostrich eggs overall are the largest eggs laid by a living animal. Adult ostriches weigh over 300 pounds. Ostrich eggs are actually the smallest bird eggs in relation to the adult bird's size. Chickens meant for egg production weigh at least 3 pounds, making even small eggs a significant percentage of the adult's body weight.