One of the reason we take a hedgehog as the notebook paper background is that we hope all the book users will stay as cool as the hedgehog and has the same ability to protect ourselves.
A4 – 210*300 MM – Large
A5 – 145*210 MM -Medium
A6 – 105*148 MM – Small
*Number of Pages: 160 (80 sheets)
*Page Layout: Lined / Plain / Dotted / Grid