Common dice are small cubes most commonly 1.6 centimetres (0.63 in) across,[citation needed] 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;[8] 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.[9]