3D Sculpture Puzzles Mount Rushmore Challenging Layer Puzzle. © 1998. Milton Bradley Company. Sealed box measures 15-7/8" x 12-1/4" x 4-1/4". When completed, the puzzle measures 15-3/8" x 9" x 6-7/8". Condition is brand new and factory sealed. Shipped via buyer's choice of USPS Priority Mail, UPS Ground, or FedEx Ground.