The Luna Cosmo Glass Hookah measures 6 inches in diameter and is a little bit bigger than your hand. Like all Luna products, it includes a shower head diffuser which makes the smoke flavorful and thick. The Luna Cosmo may be small however like all Luna Hookahs it smokes like a dream without compromising quality or portability. Luna Hookahs only use top-grade glass and thick joints. The fact that they are smaller than most glass hookahs makes them easy to handle and more durable.