Can we not have a varied choice of dimensions sizes to choose from?

Hi,
V5
I never find a dimension size that suits, its microscopic, select another and its huge, select another and no better.

Could by default there not be maybe 10 choices each one 50% larger than the last one ?

I know one can set about creating ones own styles then saving as template, but in that case there may as well be just one called default.

Steve