Banty eggs, compared to mature large-breed hens like RIR, BR, sex links etc are definitely much smaller. The pic in my post was of a banty egg (the lighter one) and a young full-sized hen. Think it might have been one of my BO's. You'll need to use two banty eggs for every large egg in baking.
I have 5 Dutch banty hens and they lay anywhere from 3-5 eggs a day. Tuesday I even found 6! Not sure how that happened...
Here's a pic to compare a standard hen egg vs a banty egg. I've found that the yolks are almost the same size but the banty egg has less white. Some people we sell our...