4x6

The 4x6 index card is a slightly larger version of the ubiquitous 3x5 card. Measuring 4 inches wide and 6 inches tall, it provides a total surface area of 24 square inches. Also referred to as the jumbo index card, this size offers additional room for writing notes, making lists, and studying compared to 3x5 cards. The extra space allows more information to be captured on a single card, making the 4x6 a popular choice for detailed flashcards, lengthy recipes, and other applications where space is at a premium. Like the 3x5, the 4x6 size became popular in the late 1800s for library card catalogs and student note taking. Its added portability versus even larger sizes has ensured the 4x6 remains popular worldwide. Students, teachers, office workers, writers, cooks, and others appreciate the versatility of this index card size when they need just a bit more writing and organizational space.