1 for each child, 2 for me, 2 or 3 for dh (depending on how hungry he is). Dd will often want 2 as well. So that makes 7-9 eggs for the five of us. More if scrambled, as scrambled eggs never seem to go as far as boiled or sunny-side-up.
We tend to use large eggs, or even extra-large when I can get to the farm to buy them (instead of supermarket). If we're having medium eggs, then we will have even more at one sitting.