JB7

At just 91mm x 128mm (3.6 inches x 5 inches), the JB7 paper format is the second smallest of the JIS B standard paper sizes. Its petite 0.0117 square meter area allows efficient use of materials for tiny printing needs like labels, business cards, and receipts. Part of the Japanese B series introduced through post-WWII industrial standardization, JB7 perpetuates the classic Japanese "Kiku" aspect ratio. Without significant alternative names and very narrowly adopted outside East Asia compared to ISO sizes, JB7 nonetheless serves an important role enabling tightly sized hard copy output of diminutive components and inserts across the Asian printing industry. Its origins trace to mid-20th century efforts adapting German and other standards into localized industrial norms suitable for Japan and neighboring regions. Though obscure globally, JB7's miniature dimensions fill a practical niche.