viewing_distance_ft,viewing_distance_m,min_body_text_pt,headline_pt,fine_print_pt,comfortable_letter_height_in,minimum_letter_height_in,comfortable_letter_height_mm,minimum_letter_height_mm
3,1,18,36,12,0.3,0.15,8,4
6,2,24,48,16,0.6,0.3,15,8
10,3,36,72,24,1,0.5,25,13
15,5,48,96,32,1.5,0.75,38,19
20,6,60,120,40,2,1,51,25
30,9,84,168,56,3,1.5,76,38
50,15,132,264,88,5,2.5,127,64