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Photo 8×10 vs JIS B5

Photo 8×10JIS B5
Millimetres203.2 × 254182 × 257
Inches8 × 107.17 × 10.12
Centimetres20.3 × 25.418.2 × 25.7
Aspect ratio1:1.251:1.41
Area516.1 cm²467.7 cm²

Which is bigger

Photo 8×10, by 10.3% in area. Photo 8×10 is 21.2 mm wider than JIS B5. JIS B5 is 3 mm taller.

Printing one on the other

Neither sheet fits inside the other at full size: Photo 8×10 is the wider of the two while JIS B5 is the taller, so each overruns the other on one edge. Whichever way you go, something has to scale or crop.

You wantSet the print scale toLeaves
Photo 8×10 artwork on JIS B5 paper89.6%0 × 29.5 mm margin
JIS B5 artwork on Photo 8×10 paper98.8%23.3 × 0 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: Photo 8×10 is 1:1.25 and JIS B5 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 29.5 mm of unwanted margin.

Frequently asked questions

What is the difference between Photo 8×10 and JIS B5?

Photo 8×10 is 203.2 × 254 mm and JIS B5 is 182 × 257 mm. Photo 8×10 is the larger of the two by 10.3% in area.

Can I print Photo 8×10 on JIS B5?

Not at full size. Scale it to 89.6% and it fits inside JIS B5 with 0 × 29.5 mm to spare.

Which is bigger, Photo 8×10 or JIS B5?

Photo 8×10 — 203.2 × 254 mm against 182 × 257 mm, which is 10.3% more area.

Related comparisons

Photo 8×10 in full · JIS B5 in full · All size comparisons · All paper sizes