4ft x 18in x 18in. Approx 250 litres. I'm from Australia so I don't know what that is in gallons. Pine stand, pine hood. 2 x fluro lights inside hood. Undergravel filter, Fluval 203 canister, skimer, heater, approx 20lb LR, 2 inch crushed coral substrate, 2 x damsels, 1 x lunare wrasse & 1...