Are you asking if you can make the little box that contains the tick larger?
If so then I don't think it can be .... only that actual Check Box itself can
be made bigger ,,, unless anyone else knows something that can be done.
Where I've seen this problem is with worksheets that have been shrunk to ~
50% view to get more rows and columns on screen, then the font has to be
made 20 pts high to be legible. Is it possible to change the view back to
100%, and shrink the fonts and the various objects (charts and shapes) on
screen?