Come and see our amazing products. This electric USB beverage warmer is made of aluminum plate. It measures about 4.05" x 4.05"x 0.63". The surface on the electric USB beverage warmer is very easy to clean. This beverage warmer is not designed to heat up drinks. It is only designed to keep drinks warmer for longer periods of time. 4.05" Pls confirm further with us if any query about packing info, inventory status and time schedule.