B3 Paper Size

B3 measures 353 × 500 mm (13.90 × 19.69 inches), sitting between A3 and A2 in the ISO 216 standard. B3 is well suited for small posters, menus, maps, and large brochures that need more space than A3 provides.

What Size is B3 in Inches?

B3 is 13.90 × 19.69 inches (353 × 500 mm), between A2 and A3 in size and often used for small posters and menus.

B3 in Pixels

Pixel dimensions depend on DPI (dots per inch). 300 DPI is the standard for commercial printing.

Use our free Inches to Pixels converter or Millimeters to Pixels converter to calculate pixel dimensions at any DPI.

B3 with Bleed

Standard bleed for ISO sizes is 3 mm per side. This adds 6 mm to both width and height.

Size Comparison

B3 is half the area of B2 (500 × 707 mm) and double the area of B4 (250 × 353 mm). It is noticeably larger than A3 (297 × 420 mm), giving designers about 40% more space for content while staying in a similar format range.

Common Uses

• Small posters and window displays
• Restaurant menus and wine lists
• Folding maps and tourist guides
• Large brochures and program booklets
• Presentation materials and flip charts

Design Tips

• B3 works well for tri-fold designs that open to a wide reading surface.
• Set up your document with a 3 mm bleed and keep critical content at least 5 mm from the trim edge.
• At 300 DPI, B3 is approximately 25 megapixels — manageable for most design workstations.
• B3 is not as widely stocked as A3, so confirm paper availability with your printer before committing to the format.