Assorted colors of the index card dividers make your working space brighter and easy for color coding projects. Neando Index Cards Guide Dividers. Suit for Regular 3″x5″ Index Cards Regular 3″x5″ Index Cards Regular 3″x5″ Index Cards Regular 3″x5″ Index Cards Regular 3″x5″ Index Cards Regular 4″x6″ Index Cards Regular 5″x8″ Index Cards.