B7
B-Series (ISO 216) · 7 specs
Direct Answer
B7 is an ISO 216 standard paper size measuring 88 × 125 mm (3.46 × 4.92 inches). Standardized under ICAO Doc 9303 as the official ID-3 machine-readable travel document format, it is the universal size for all national passport booklets issued worldwide.
Source: ISO 216:2007 / ICAO Doc 9303 (Machine Readable Travel Documents — ID-3 Format) · Last reviewed Aug 28, 2026
Specs
| Width × Height (Metric) | 88 × 125 mm |
| Width × Height (Imperial) | 3.46 × 4.92 in |
| Nominal Surface Area | 0.011 m² (11,000 mm²) |
| Geometric Mean Origin | Geometric mean of A6 (105×148 mm) and A7 (74×105 mm) |
| ICAO Travel Document Code | ID-3 format (Mandated for all electronic e-Passports globally) |
| Weight of 80 gsm Sheet | 0.88 grams |
| Primary Applications | International national passports, small pocket memo booklets, specialized medical record booklets |
The Global Passport Standard (ICAO ID-3)
Under the International Civil Aviation Organization (ICAO, a United Nations specialized agency) Doc 9303 Part 5, national passports are specified to the ID-3 format (88.0 × 125.0 mm ± 0.75 mm), which is derived directly from ISO 216 B7. This standardization is intended to let airport e-Gates, border immigration optical scanners, and airline RFID biometric readers work consistently across issuing countries.