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C9

C Series

Extremely small envelope size used for A9 documents, micro storage pouches, seed packets, and sample holders.

Physical Dimensions
Exact measurements in multiple units for precision printing and design
40 × 57 mm
1.57" × 2.24"
113 × 162 pt

Used in desktop publishing software

9 × 13 pc

Traditional typography unit

4.0 × 5.7 cm

Metric system measurement

Digital Dimensions (Pixels)
Pixel dimensions for different DPI settings - essential for digital design and printing
72 DPI (Screen)

Standard screen resolution for web and digital display

113 × 162 px
150 DPI (Draft Print)

Good quality printing for drafts and proofs

236 × 337 px
300 DPI (High Quality Print)

Professional printing standard for high-quality output

472 × 673 px
Common Applications
How and where C9 is typically used across different industries and contexts

Common Applications

  • A9 envelopes
  • Micro pouches
  • Seed packets
  • Sample holders
Visual Scale
Relative size representation
C940 × 57mm

Scaled representation (not actual size)

Quick Tools
Size ConverterAll Paper SizesTemplates
Related C Series
Other sizes in the same series
C0C1C2C3C4C5

Technical Standards

Series: C

Aspect Ratio: 1:√2 (1.414)

Standard: ISO 269

Origin: International (ISO)

✦ Features

C9 Paper Size Advantages

Discover the key advantages and applications of C9 paper size for your projects.

Perfect Dimensions

C9 measures 40 × 57 mm, ideal for professional applications.

International Standard

Part of the C series, C9 follows international standards for global compatibility.

Versatile Applications

Perfect for A9 envelopes, Micro pouches and many other professional uses.

Print Ready

Optimized for both digital display and high-quality printing with precise pixel dimensions.

Multiple Units

Available in millimeters, inches, and pixels - 1.57" × 2.24" in imperial units.

Universal Compatibility

Works seamlessly with all major design software, printers, and international standards.

FAQ

C9 Questions & Answers

Common questions about C9 paper size and its applications.

What are the exact dimensions of C9?

C9 measures exactly 40 × 57 millimeters or 1.57 × 2.24 inches.

What is C9 commonly used for?

C9 is commonly used for A9 envelopes, Micro pouches, Seed packets among other applications.

What series does C9 belong to?

C9 belongs to the C series, which is part of international paper size standards.

What are the pixel dimensions of C9?

For digital use: 113 × 162 pixels at 72 DPI, 472 × 673 pixels at 300 DPI for high-quality printing.

Can I use C9 for professional printing?

Yes, C9 is perfect for professional printing. It follows international standards and provides excellent print quality for business and creative applications.

Which design software supports C9?

C9 is supported by all major design software including Adobe Creative Suite, Figma, Sketch, Canva, and Microsoft Office applications.