B6
B-Series (ISO 216) · 7 specs
Direct Answer
B6 is an ISO 216 standard paper size measuring 125 × 176 mm (4.92 × 6.93 inches) with a surface area of ~0.022 square meters. Created by cutting a B5 sheet in half, it is standard for mass-market paperback novels, Japanese manga tankōbon volumes, and multi-language consumer product warranty booklets.
Source: ISO 216:2007 / JIS P 0138 · Last reviewed Aug 28, 2026
Specs
| Width × Height (Metric) | 125 × 176 mm |
| Width × Height (Imperial) | 4.92 × 6.93 in |
| Nominal Surface Area | 0.022 m² (22,000 mm²) |
| Geometric Mean Origin | Geometric mean of A5 (148×210 mm) and A6 (105×148 mm) |
| Japanese JIS B6 Distinction | JIS B6 (128 × 182 mm) is the standard commercial manga tankōbon format |
| Weight of 80 gsm Sheet | 1.76 grams |
| Primary Applications | Paperback novels, manga volumes (Tankōbon), consumer electronics warranty manuals |
Pocket Literature and Manga Tankōbon
B6 is the preferred size for international paperback fiction because its narrow 125 mm width allows the reader to hold and turn pages with a single hand. In Japan, virtually all commercial manga comic collections (tankōbon) are published in JIS B6 (128 × 182 mm).