Measuring cups and spoons are precise tools used to measure and portion ingredients accurately for recipes. Measuring cups come in various sizes, typically 1 cup, 1/2 cup, 1/3 cup, and 1/4 cup, while measuring spoons include common measurements like 1 tablespoon, 1 teaspoon, 1/2 teaspoon, and 1/4 teaspoon. These tools ensure consistency in cooking and baking by providing accurate measurements of dry and liquid ingredients. They are essential for achieving the desired results in recipes and maintaining flavor and texture consistency.