5x8

With dimensions of 5 inches wide and 8 inches tall, the 5x8 index card provides 40 square inches of ample writing space. Sometimes referred to as the mega index card, this plus-sized card offers even more expansive room for notes, formulas, diagrams and other lengthy writing needs. The considerable surface area enables large amounts of information to be captured on a single card. While the oversized 5x8 lacks the portability of small 3x5 or 4x6 cards, its expanded capacity can be ideal for super-detailed flashcards, complex formulas, large diagrams, and other applications requiring maximum space. The 5x8 size emerged in the early 20th century as an extension of the standard library card catalog sizes, adding another option when the smaller cards were filled. Today, students, educators, scientists, designers, and others with expansive writing or visual needs benefit from the spacious 5x8 index card. It meets the need when typical sizes just aren't enough.