
I bought 2 of these which to be honest would be more than enough for now but I'm glad I have another on hand if needed. I bought a large clear one with black tape to close it and it easily holds 240 cats. However, I see many people using them to save KPOP maps. I use mine to keep my Zentangle reference cards (4 pack series are also available on Amazon and are very handy for easy reference on the go.) And these cards are the same size as baseball cards and any other trading cards of the same size. like baseball cards are great. This size will not slip or damage the cards! Of course, ID cards, club cards, Insta photos, business cards fit in easily (but if they are NOT the same size as baseball cards, there is leeway). cards in the same slot. On one side, insert the card with the side you want to see into all 3 slots on the side, turn the side over, then repeat on the back of the same side. *If you want to see both sides of your maps and need more than 240, just buy 2 books (it may not be the price or travel size they offer) and take the extra pages you need from the extra book , because you can easily add pages! I highly recommend this item, I carried my reference cards in both card cases and index card storage boxes lol and all the other card books were more than what I wanted to take with me on the go. I hope this review helps and gives another example besides kpop postcards!

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