This is a planner cover that came with a planner I purchased from MUJI. I'm using a different cover for my planner, so I've decided to sell this one as I don't need it. It's transparent, allowing you to clearly see the cover of your planner. Also, since it's made by MUJI, the material is sturdy. There are two sets. If you want to take good care of your planner, please consider purchasing. Planner size: B6 size When shipping, I will package the covers to prevent scratches, but I will fold them in half for shipping (it won't leave any marks). Thank you for your understanding.