eggonomics

You should probably buy smaller eggs. 

As egg grams-per-unit drops, $-per-gram drops faster.

Supply : marginal increases in egg size, cost more and more ( due to diseconomy of scale, i.e., production inelasticity ) as bird food is metabolically processed into eggs. Also, larger eggs are from older hens ( older hens are always less abundant than younger hens ).

Demand : cultural inelasticity applies to large eggs because of standard recipes, and status/class norms. The largest eggs are furthermore a bit of a veblen good.

Here we compare an A sized 65g egg and a D sized 50g egg, less shells. As shell mass is roughly the same regardless of egg size, smaller eggs are sturdier, whereas larger eggs are more fragile.

You will find the price of D eggs to be less than 75% the price of A eggs, though D eggs contain about 75% the edible mass of A eggs.