What is the equivalent of a teacup measure?

A teacup measure typically refers to the volume of a standard teacup, which can vary depending on the size of the cup. However, a common conversion used in recipes is:

1 teacup = 6 fluid ounces (fl. oz.) = 180 milliliters (ml)

Please note that this is a general estimate, and the exact volume of a teacup may vary slightly. If precise measurements are required, it's best to use standard measuring cups or spoons to ensure accuracy in cooking or baking recipes.