Since it's transparent, titles are easy to see and books can be stored beautifully! The thickness can be adjusted to fit the book! [For Shiroku-ban size] ■ [Compatible Size]: Supports books up to approximately 195mm (height) x 135mm (width) x 30mm (thickness) ■ [Product Size]: Approximately 200mm (height) x 382mm (width) (please note that there may be slight errors) ■ Contents: 8 sheets ■ Material: Polypropylene These are new and unused, but if there is any mistake on my part, such as sending the wrong item or an item with scratches or dirt that makes it seem not new, I will accept returns or cancellations. Will be shipped via mail. It will be posted within 2-7 days from the shipping date.