Interior message: For a year of exploration. Happy Birthday Wishes. Printed on FSC-certified paper with soy-based inks in the USA. Paired with white envelopes. Card dimensions: 4.5" x 6.25". Please note that our greeting cards are pre-priced on the back. If you prefer the added protection of cello, please select the option to add. Our cello jackets wrap around the card and envelope in a book cover-like style, allowing for the card's interior greeting to be visible.