Japanese JIS B series

JIS B3 paper size

JIS B3 measures 364 x 515 mm (14.33 x 20.28 in). Part of the Japanese JIS B series.

364 x 515millimetres

14.33 x 20.28inches

4,299 x 6,083pixels @ 300 dpi

Dimensions in every unit

Unit	Width x height
Millimetres	364 x 515 mm
Centimetres	36.4 x 51.5 cm
Inches (decimal)	14.331 x 20.276 in
Inches (fraction)	14 5/16 x 20 1/4 in
Points (1/72 in)	1031.8 x 1459.8 pt
Picas	85.98 x 121.65 pc

Pixel dimensions by resolution

Resolution	Pixels	Megapixels
72 dpi	1,032 x 1,460 px	1.5 MP
96 dpi	1,376 x 1,946 px	2.7 MP
150 dpi	2,150 x 3,041 px	6.5 MP
200 dpi	2,866 x 4,055 px	11.6 MP
300 dpi	4,299 x 6,083 px	26.2 MP
600 dpi	8,598 x 12,165 px	104.6 MP

300 dpi is the usual target for printed photos and artwork; 72–96 dpi is screen resolution.

Document size with bleed

Bleed	Millimetres	Inches
3 mm bleed (each side)	370 x 521 mm	14.567 x 20.512 in
0.125 in bleed (each side)	370.4 x 521.4 mm	14.581 x 20.526 in

How many JIS B3 fit on a press sheet

Sheet	Without bleed	With 3 mm bleed
B2 (offset)	1-up	1-up
B1 (offset)	2-up	2-up

Simple grid imposition with no gutters or gripper margin; real layouts may fit fewer.

Envelopes for JIS B3

Fold	Folded size	Envelopes that fit
Folded in half	257.5 x 364 mm	DIN E4 envelope

The √2 system

JIS B3 has an aspect ratio of 1 : 1.4148 — close to √2 (1.4142). Folding or cutting it in half across the long side produces the next smaller size in the series with the same proportions, and two sheets side by side form the next larger size. This is why scaling between sizes in the series (for example on a photocopier) never crops or distorts the page.

Frequently asked questions

What are the dimensions of JIS B3?

JIS B3 is 364 x 515 mm, which is 14.33 x 20.28 in (14 5/16 x 20 1/4 in).

How many pixels is JIS B3 at 300 DPI?

4,299 x 6,083 pixels at 300 dpi, or 2,150 x 3,041 at 150 dpi.

Sources & data

Dimensions per the relevant standard; see sources.