If you must apologize, make it a good one. This card is guaranteed to make the recipient smile, and you will be back in their good books in no time. Pop-up cards ship flat with a regular postage stamp. Simply peel back the honeycomb and press down to adhere. Packaging includes instructions, with an outer sticker highlighting this card's special feature. L 4.5" x W 5.75" x H 0.25"