My Ancona Chicken - not a duck! - laid this giant egg day before yesterday. Annie is a small chicken, built like a roadrunner, but she's a prolific layer, and her eggs average 1.9 ounces. This one was 2.9 ounces - about 81 grams! It was a double yolk. Here it is shown on top of the other chicken eggs in the carton, the other white one is her normal size from the day before (She's my only white-egg layer), the small cream color one is 1.5 ounces (the average size from the Egyptian Fayoumis).