These are the numeric capabilities:

            Variable    Cap-      TCap   Description
             Numeric    name      Code
        columns         cols      co     number of columns in
                                         a line
        ...
        lines           lines     li     number of lines on
                                         screen or page
        ...
        max_colors      colors    Co     maximum number of
                                         colors on screen
        ...

##</code><code>##

$ tput cols
120

$ tput lines
63

$ tput colors
8