I'm working on a project about "creating rules" about design and text sizes in a layout... even when you do not have the size of the layout.
My co-worker and I can't agree on the largest text size to use. It gets complicated when our designers try to explain to our co-workers what motivates our choice for the text size and proportions.
I was planning to create a formula based on distance, visual range and size of my layout (once I know the size).
Is there a formula designers use in similar situation or any guideline that can be applied (in general) to any layout, no matter the size of the layout?