I Love That You're My Grandma - Mailable Wooden Greeting Card A totally unique way of sending a personalized greeting card of love to your Grandmother Wooden box sign style postcard measures 4-in x 6-in and has printed on front "I Love That You're My Grandma" Wonderful gift for fans of Quotations and Box Signs. Once received, this card can be displayed on a bookshelf or table (leaning up against a support) or pinned to the wall or bulletin board. Write your message on the back of the card, address it and mail (additional postage required - 86 if mailing within the U.S.)