The Tobeco Belt Case Size Large is big enough to hold most 18350, 18490, and 18650 devices, as well as e-juice, a spare battery, or an extra atomizer. The case zips up the front, safely securing any hardware inside. The top opens to allow quick access to your mod, and a heavy-duty clip at the back allows it to attach to a belt loop, backpack, etc. It measures approximately 3.25″ wide by 6″ tall.