The Confetti Birthday Cake Greeting Card Puzzle from Galison is a 60-piece postcard puzzle featuring a deliciously looking birthday cake.Package comes with the puzzle fully assembled. Write the message on the back, break up the pieces, place in the envelope and mail.The ultimate birthday surprise! • A greeting card and puzzle in one!• Size: 5.5 x 7.375 x 0.375", 140 x 187 x 10 mm• 60 Piece Puzzle• Sticker Seal• Colored Envelope