Book cover compatible sizes
Height: 5.8 to 6.0 inches
Horizontal: 4.1 inches (10.5 cm).
Thickness: 0.4 - 1.0 inches (1 - 2.5 cm).
Introducing the size of each Japanese Publisher Bunko Book:
Height: 5.8" to 6" (varies by publisher)
Level: 4.1 inches (10.5 cm) (uniform by each publisher)
1 page thickness: 0.07mm to 0.1mm (depends on books, but paperbooks usually vary within this range)
Spine width depends on number of pages and thickness of paper.
Notebook standards vary from piece to piece, please check the item size before purchase.
The vertical direction is not adjustable, but the horizontal direction is adjustable.