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. Includes a response key and instructions. Dimensions: 9" x 14" (23 cm x 35.5 cm). Testing distance: 13 feet/4 meters.