This made to order, small counter stamp measure 1/2" x 1 5/8". Made of ergonomically designed plastic, nylon spring, and real rubber die, this efficient stamp reads "First Class Mail International." The die is saturated with Xstamper vegetable-based ink, giving thousands of impressions before needing to be reinked. Refill with Xstamper ink of the same color only. Lifetime manufacturer warranty included.