You are viewing: The Original Pop-Up greeting card by Second Nature Occasion: Mother's Day Details: Not just any card, this award winning pop up greeting card jumps to life from it's envelope. A miracle in paper engineering these unique 3D cards pop up to form a stunning card display making any card from this range perfect for a special occasion. Card Size: Each card comes flat in an envelope and measures 12cm x 17cm or 5" x 7" when closed and 25cm x 20cm or 9" x 8" once opened. Postal Size: Large Letter Instructions: Just close the pop up flat and write your message in the space on the side of the card or on the tag provided before placing in the envelope for sending.