Now I don't have a store bought egg for comparison but here is the size difference between the Goose Egg and a Farm Fresh Chicken egg. Goose Eggs are supposed to be about the size of 2 1/2 Chicken Eggs. I'd agree with that.
Look at the yolk! Oh my!
I couldn't get over how white the eggs were compared to the Chicken egg...and the fact that my beautiful goose isn't laying the golden eggs I had hoped for ;-)
Maybe I just need to have her lay a few more eggs?