The other equivalents featured on this chart are letter size, 20 foot, 6 meter, decimal, and LogMAR. This chart can either be wall mounted or used in an ESV1200, ESV1500, or a Model A+ illuminated cabinet. Available in 2 different "scrambled" versions when repetitive testing is involved. 600739 13/83 line is H N R 600762 13/83 line is C N R Dimensions: 9" x 14" (22.9 cm x 35.6 cm). Testing distance: 13 feet/4 meters.