Xstamper Secure Marking Black Out Stamp | Small Shachihata Secure Stamp Xstamper Secure Marking Black Out Stamp | Small Shachihata Secure Stamp This block out stamp is only available in Black ink. Secure Stamp obscures private information including bank account numbers and signatures. Perfect for bank statements, mail, legal contracts, prescriptions and magazine labels. Xstamper black out stamp size is 1 5/8" x 1/2".