Bird eggs come in a wide variety of sizes. The largest egg from a living bird belongs to the ostrich. It is more than 2,000 times larger than the smallest bird egg, which is produced by the hummingbird. Ostrich eggs are about 7.1 inches long, 5.5 inches wide and typically weigh 2.7 pounds. Hummingbird eggs are half an inch long, a third of an inch wide and weigh half a gram, or less than a fifth of an ounce.