A cubic meter of gravel is a large, heavy pile of stone that measures about 1 cubic yards in volume. When poured into a loose pile, it is 7.02 ft (2.14 m) wide and 32.9 in (83.5 cm) tall, which you can visualize next to a basketball, a 5-gallon bucket, and an adult person.

Volume
1.31 cubic yards
1.31 yd³ (1 m³)
about the size of a refrigerator
Gravel typically ranges 1.6–1.9 g/mL depending on how it's packed. A firmly packed scoop weighs more.