体积 (tǐ jī): volume

This box doesn't look big, but its volume is enough to hold all my books.

After water turns into ice, its volume increases, so the water in a bottle may burst the bottle after freezing.

The engineer measured the volume of this stone, and then calculated its weight based on its density.

Although this new phone is powerful, its volume is very small, so it can easily fit into a pocket.

When a gas is heated, its volume expands; this is an example of the phenomenon of thermal expansion and contraction.