OST 5115 was the Soviet paper-size standard introduced in 1932. It broadly followed the principles of DIN 476, but used a separate Cyrillic A, B and V series with different dimensions. It was superseded by GOST 9327 when the Soviet Union adopted ISO 216. Use these dimensions to identify historical material only.
| Size | Dimensions (mm) | Approx. dimensions (in) |
|---|---|---|
| А0 | 814 × 1152 | 32.0 × 45.4 |
| А1 | 576 × 814 | 22.7 × 32.0 |
| А2 | 407 × 576 | 16.0 × 22.7 |
| А3 | 288 × 407 | 11.3 × 16.0 |
| А4 | 203 × 288 | 8.0 × 11.3 |
| А5 | 144 × 203 | 5.7 × 8.0 |
| Б0 | 747 × 1056 | 29.4 × 41.6 |
| Б1 | 528 × 747 | 20.8 × 29.4 |
| Б2 | 373 × 528 | 14.7 × 20.8 |
| Б3 | 264 × 373 | 10.4 × 14.7 |
| Б4 | 186 × 264 | 7.3 × 10.4 |
| Б5 | 132 × 186 | 5.2 × 7.3 |
| В1 | 628 × 888 | 24.7 × 35.0 |
| В2 | 444 × 628 | 17.5 × 24.7 |
| В3 | 314 × 444 | 12.4 × 17.5 |
| В4 | 222 × 314 | 8.7 × 12.4 |
| В5 | 157 × 222 | 6.2 × 8.7 |
For current production, use ISO 216 formats or the printer’s specified stock. Sources: Wikipedia’s paper-size reference and GOST 9327.