SIZE: These cards are A2 size and measure 5.5" x 4.25".QUANTITY: Includes 1, 12 or 24 thank you cards and envelopes that feature a square back flap.INSIDE: Card interior is blank, leaving room for a custom heartfelt greeting for any occasion.ECO-FRIENDLY: Twigs cards, envelopes, and packaging are 100% eco-friendly products made from recycled materials.FREE SHIPPING: All of our cards are packaged and shipped without plastic. All orders are shipped via USPS at a standard rate. Tracking numbers are included for all orders. Please check the USPS website for information about shipping delays throughout the United States.