B3 vs C3
| B3 | C3 | |
|---|---|---|
| Millimetres | 353 × 500 | 324 × 458 |
| Inches | 13.9 × 19.69 | 12.76 × 18.03 |
| Centimetres | 35.3 × 50 | 32.4 × 45.8 |
| Aspect ratio | 1:1.42 | 1:1.41 |
| Area | 1765 cm² | 1483.9 cm² |
Which is bigger
B3, by 18.9% in area. B3 is 29 mm wider than C3. B3 is 42 mm taller.
Printing one on the other
A C3 page fits inside B3 whole — print it at 100% and you get a 14.5 mm border down each side and 21 mm top and bottom.
| You want | Set the print scale to | Leaves |
|---|---|---|
| B3 artwork on C3 paper | 91.6% | 0.7 × 0 mm margin |
| C3 artwork on B3 paper | 109% | 0 × 1 mm margin |
These are the numbers for the "custom scale" box in a print dialog. "Fit to page" computes the same thing, but knowing the figure tells you in advance whether the result will look deliberate or accidental.
Why the shapes matter
The proportions differ: B3 is 1:1.42 and C3 is 1:1.41. That difference is why a layout moved between them never quite lines up — scale it to fit one edge and the other is left with 0.7 mm of unwanted margin.
Frequently asked questions
What is the difference between B3 and C3?
B3 is 353 × 500 mm and C3 is 324 × 458 mm. B3 is the larger of the two by 18.9% in area.
Can I print B3 on C3?
Not at full size. Scale it to 91.6% and it fits inside C3 with 0.7 × 0 mm to spare.
Which is bigger, B3 or C3?
B3 — 353 × 500 mm against 324 × 458 mm, which is 18.9% more area.
B3 in full · C3 in full · All size comparisons · All paper sizes