This was the biggest egg I've ever had from my flighty little Leghorn! So far, it's the only gigantic egg she's left me. It weighed out at a whopping 3.8oz! Her next three eggs were much smaller but after that, she was back to her normal X-large. I never did crack it to see if it was a double-yoke but candling indicated it was a single. It was a good "show and tell" item. The picture of egg carton contain all x-large eggs. The third picture is a comparison of what her egg looked like the day before she laid the giant.