These sheets contain 4 of the 9 x 9 Sudoku puzzle grids with the digits one to nine in each square. They are used in solving Sudoku puzzles and come 15 sheets to a package. They are available in the following colors. 1) black 2) red 3)gold 4) blue 5)green 6)turquoise 7)purple 8) orange 9) brown 10)grey and 11) a random mixture of colors. I like to do these puzzles with a pen (old eyes need darker colors) so I like the lighter color underneath. I generally use a black pen. But a pencil would work fine on these also. The cost of shipping is included in your price.