Cat Address Stamp - Block Cat Stamp - Custom Cat Address Stamp HOW TO CUSTOMIZE: After ordering. Please go to "YOUR ORDERS" and then "CONTACT SELLER" to let us know what you would like on your Return Address Stamp. Cat Address Stamp - Block Cat Stamp - Custom Cat Address Stamp Custom Return Address Stamp is self inking. Impresssion can last for up to one thousand impressions before being reinked. Custom Address Stamp impression is approximately 1.65" x 1.65". Default color is BLACK unless otherwise stated in Customization. All orders are made to order. Most orders ship within 24 business hours of your customization being received.