Block letters are printed characters that occupy a uniform rectangular space, often used for addresses, forms, and signage. When dealing with four‑block arrangements—typically two lines of two characters each—designers must decide how to align spacing, line weight, and capitalization. Each choice influences visual hierarchy and the ease with which readers extract information.
The guide examines three widely adopted criteria: visual balance, space efficiency, and compliance with common style guides. By assessing these factors, you can determine which arrangement minimizes ambiguity while meeting the practical constraints of your medium, whether it’s a printed envelope, digital form, or large‑format display.