JB9

At just 45mm x 64mm (1.8 inches x 2.5 inches) in size, the JB9 paper format has a miniscule 0.0029 square meter area as the second smallest format in the JIS B standard paper sizes. JB9's highly compact dimensions allow extremely efficient material usage for tiny accent components like seals and stickers. As part of the JIS B series that emerged from post-WWII Japanese industrial standardization, JB9 maintains the classic "Kiku" aspect ratio. It does not have significant alternate names and has little adoption abroad compared to globally used ISO sizes. But within East Asian printing ecosystems, JB9 fills an important niche role for precise micro-format output when minimal footprint is necessitated. Continuing traditional expressions of efficient resource usage through standardized industrial norms, JB9's diminutive dimensions enable specialty printing applications and fine-grained printed accents that benefit from its petite surface area.