Celebrate the special young hero in your life with this awesome pop-out Marvel Avengers birthday card. This product is fully recyclable and features an innovative pop-out 3D design and co-ordinating bright blue, Hallmark branded envelope. Message Inside Reads: It s time for an awesome birthday! Flat Card Measures 22.8cm by 15.9cm, Assembled Card Measures 22.2cm by 25.7cm by 12cmWithin UK Large Letter Postage Size Limits.