Secure Stamp - Impression Size: 1/2" x 1-5/8". Protect yourself with the Xstamper Secure Stamp. The special black ink obscures private information. Perfect for hiding personal informtion on mail and packages, also useful on prescription bottles, price tags on gifts and sensitive documents. Covered information can't be easily read, scanned or copied. Works best on printed black ink. This stamp is refillable see below to add a bottle of ink to your order. Packed in a peggable clam shell.