This 399 piece puzzle is constructed vertically in order to create a 3D haunted house. The foam-backed puzzle pieces easily fit together and come with a complete instruction manual. Once the lights go out, the house is transfromed from a regular victorian house into a glowing haunted house, complete with spooky bones and ghosts. Upon completion, the dimensions measure: 9.5" x 8.25" x 12.75" (24.1 cm x 21 cm x 32.4 cm)