You pick up a carton of eggs on your grocery run, checking to make sure they’re all intact before adding them to your cart. But have you ever thought about the size of those eggs? Probably not, right?

Shop smarter by knowing the weight and volume differences between egg sizes — small, medium, large, extra-large, and jumbo — plus how to substitute for them in recipes. gojak/Getty Images My husband ...

Not all eggs are created equal. Medium eggs contain about 1 ¾ ounces of liquid, or just under ¼ cup. Large eggs, the most popular size used in our recipes, have about 2 ounces of liquid or ¼ cup.

Troubleshooting other people’s baking recipes is one of my favorite pastimes (my own recipes: that’s a different story). I like to go through all of the possibilities—the temperature of the oven, ...