B8 size, horizontal insertion type. I hope you'll find it useful for your "oshi-katsu" (supporting your favorite idol/character)! *Due to being handmade, there may be some air bubbles. *Also, although we use new hard cases, there may be scratches or distortions inherent in the material. *It is vulnerable to strong impacts, so parts may come off if dropped or bumped. *Trading cards are not included. *Please remove the protective sheet on the back before use. Feel free to comment if you have any questions! ^ ^