It's over 5 feet long on each edge and weighs about 224 pounds!
Tony Fisher, a puzzle collector and enthusiast, could have built it larger. But he wanted to be able to fit it inside the doors of his house, as well as light enough for one person to solve it. It's completely functional, just like the standard Rubik's Cube. But because it has 20,000 times the volume of the original puzzle, maneuvering its pieces requires some effort.
-via Laughing Squid