Common dice are small cubes most commonly 1.6 centimetres (0.63 in) across, whose faces are numbered from one to six, usually by patterns of round dots called pips. (While the use of Hindu-Arabic numerals is occasionally seen, such dice are less common.) Opposite sides of a die traditionally add up to seven, implying that the 1, 2 and 3 faces share a vertex; these faces may be placed clockwise or counterclockwise about this vertex. If the 1, 2 and 3 faces run counterclockwise, the die is called “right-handed”, and if those faces run clockwise, the die is called “left-handed”. Western dice are normally right-handed, and Chinese dice are normally left-handed.