Beakers typically measure volume, and their units are usually milliliters (mL) or liters (L).

Here's a breakdown:

* Volume: The amount of space a substance occupies.

* Milliliters (mL): A common unit for measuring small volumes of liquids.

* Liters (L): A larger unit for measuring larger volumes of liquids.

You'll often see beakers marked with graduations (lines) to indicate different volumes. Keep in mind that beakers are not designed for precise measurements. For more accurate measurements, you would use a graduated cylinder or volumetric flask.