I purchased this at the theater when I saw the Shiki Theatre Company's "Back to the Future" in June 2025. I bought it as a souvenir for myself, but I never ended up using it, so it's unused and unopened. This is a collaboration item with "Rollbahn." It's a B6 size notebook with clear pockets. Size: 18.2 cm tall x 14.3 cm wide x 1.5 cm thick