Sloan letters with line sizes 20/400, 20/320, 20/250, 20/200,  20/160, 20/125, 20/100, 20/80, 20/63, 20/50, 20/40, 20/32, 20/25, 20/20, 20/16, 20/12.5 and 20/10. Continuous text on the reverse with line sizes 20/80, 20/63, 20/50, 20/40, 20/32, 20/25, 20/20, and 20/16. Card measures 3.75” x 6.25” (9.5 cm x 16 cm). Show Snellen in Feet and Meters plus Letter Size and Decimal.