How big is a kilo of Cocaine?

1 kilo (kilogram, 2.2 pounds) of cocaine (compressed) would be about 4 inches by 8 inches by 1.5 inches thick or 48 cubic inches, an inch longer than a large paperback book.

This is about 10 x 20 x 4 cm. (800 cm3) at 1.216 g/cm3

Other nonstandard brick sizes include 9.5 x 6 x 1 inch and are slightly more than a kilo.