B3 Paper Size
B3 in the Japanese JIS B series is 364 × 515 mm (14.33 × 20.28 in), half of B2. At 300 DPI it's 4299 × 6083 pixels. It's the B3 size used in Japan for small posters, menus and in-store signage. The international ISO B3 is slightly smaller at 353 × 500 mm, so confirm which standard your printer works to before you send files.
In Playyy, write “B3, 4,299 × 6,083 px” in your prompt and the design is created at that size at 300 DPI.
Specifications
| Pixels | 4,299 × 6,083 px (at 300 DPI) |
| Millimetres | 364 × 515 mm |
| Centimetres | 36.4 × 51.5 cm |
| Inches | 14.33 × 20.28 in |
| Aspect ratio | 1:1.414 |
| Colour mode | CMYK |
| Bleed | 3 mm |
| Safe zone | 5 mm from trim |
Design at B3 size with Playyy
Free to start · Watermark-free exports
B3 in Pixels at Different DPI
The pixel count changes with DPI setting — choose the right one for your output.
| DPI | Width (px) | Height (px) | Use |
|---|---|---|---|
| 72 | 1,032 | 1,460 | Screen preview, PDF viewers |
| 96 | 1,376 | 1,947 | Windows screen standard, digital documents |
| 150 | 2,150 | 3,042 | Medium-quality print, home printers |
| 300 | 4,299 | 6,083 | Professional print, commercial offset |
Design Tips
- →For print, design at 300 DPI (4299 × 6083 px) in CMYK with 3 mm bleed on every edge, which makes the working canvas 370 × 521 mm.
- →B3 shares the 1:√2 ratio of the A series, so a layout built for an A size scales to B3 without cropping — only the type sizes need checking.
- →Japanese print shops and copiers use JIS B, while most of Europe uses ISO B. Name the standard in your print order: JIS B3 is 364 × 515 mm, ISO B3 is 353 × 500 mm.
- →Keep text and logos at least 5 mm inside the trim so a slightly off-centre cut leaves them intact.
How to Make B3 Designs in Playyy
Three steps, no design software. Include B3 and 4,299 × 6,083 px in your prompt to set the design size.
- 1
Open Playyy
Playyy runs in your browser, so there's nothing to download. Sign in and you'll land on the Home page.
- 2
Type your prompt and set the B3 size
Describe what you want in the input box on the Home page and include "B3 at 4,299 × 6,083 px, 300 DPI" in your prompt. Playyy uses those dimensions for your design.
- 3
Create your B3 design and export it for print
Playyy generates the design at the full 4,299 × 6,083 px — that's B3 at 300 DPI, the resolution commercial print expects. Allow 3 mm of bleed and export a print-ready PDF. Colour mode: CMYK.
Create B3 designs with Playyy
In Playyy, write “B3, 4,299 × 6,083 px” in your prompt and the design is created at that size at 300 DPI.
Start designing free →Make something at B3
Prepare your image
See it in a workflow
Frequently Asked Questions
What is B3 size in mm?+
B3 is 364 × 515 mm (36.4 × 51.5 cm, or 14.33 × 20.28 in) in the Japanese JIS standard. The ISO B3 used internationally measures 353 × 500 mm. Both keep the same 1:√2 proportions as A-series paper.
What is B3 size in pixels?+
At 300 DPI, JIS B3 is 4,299 × 6,083 px. At 150 DPI it's 2,150 × 3,042 px, and at 96 DPI it's 1,376 × 1,947 px. Use 300 DPI for anything going to a printer and 96 DPI for on-screen documents.
What is B3 paper used for?+
Small posters, café menus, counter signage and framed prints. In Japan B3 is a standard stock size, so paper, frames and folders in this size are easy to buy.
What is the difference between JIS B3 and ISO B3?+
JIS B3 (364 × 515 mm) is the Japanese B size and ISO B3 (353 × 500 mm) is the international one. Each JIS B size has 1.5 times the area of the A size with the same number, while each ISO B size sits between two neighbouring A sizes. Japanese print shops default to JIS.
How do I make a design in B3 size?+
Open Playyy, describe what you need in the prompt box and add “B3, 4,299 × 6,083 px” to your description. The design is generated at 4,299 × 6,083 px (300 DPI), every element stays editable, and you can export a print-ready PDF. Playyy is free to start.