An extremely small Rubik’s Cube has gone on sale in Japan for 198,000 yen, or about $1,900. Advertised as a “super-small” Rubik’s Cube, it was created to mark the 40th anniversary of the box-shaped puzzle in Japan. The cube measures just 9.9 millimeters by 9.9 millimeters and weighs 2 grams. The puzzle is made of metal and comes with a box for its display, says MegaHouse Corporation, a business of Japan’s Bandai Company. The Rubik’s Cube is very small but playable. People can buy it now and expect shipment beginning in December. Erno Rubik of Hungary invented the Rubik’s Cube in the 1970s. At the time, he was an architecture professor. An American company, Ideal Toys, turned the puzzle into a hit product in the 1980s. It was an immediate hit in Japan, where more than 4 million were sold in the first eight months after it went on sale in July 1980. By 1982, more than 100 million Rubik’s Cubes were sold worldwide.