The 3DS Circle Pad Expansion might look like a beefy behemoth, but there's something appealingly dinky about the box it comes in, in Japan at least.

Amazon Japan has an image of the accessory's retail packaging along with a 10th December release date and price of ¥1,500.

The box's bottom-right corner also bears an important logo that will also appear on software that supports the expansion, recently called the "Slider Pad" by Nintendo UK.