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C3

C Series

Envelope size designed for A3 documents, large certificates, professional photo prints, and presentation materials.

Physical Dimensions
Exact measurements in multiple units for precision printing and design
324 × 458 mm
12.76" × 18.03"
918 × 1298 pt

Used in desktop publishing software

76 × 108 pc

Traditional typography unit

32.4 × 45.8 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

918 × 1298 px
150 DPI (Draft Print)

Good quality printing for drafts and proofs

1913 × 2705 px
300 DPI (High Quality Print)

Professional printing standard for high-quality output

3827 × 5409 px
Common Applications
How and where C3 is typically used across different industries and contexts

Creative & Design

  • Photo prints
Visual Scale
Relative size representation
C3324 × 458mm

Scaled representation (not actual size)

Quick Tools
Size ConverterAll Paper SizesTemplates
Related C Series
Other sizes in the same series
C0C1C2C4C5C6

Technical Standards

Series: C

Aspect Ratio: 1:√2 (1.414)

Standard: ISO 269

Origin: International (ISO)

✦ Features

C3 Paper Size Advantages

Discover the key advantages and applications of C3 paper size for your projects.

Perfect Dimensions

C3 measures 324 × 458 mm, ideal for professional applications.

International Standard

Part of the C series, C3 follows international standards for global compatibility.

Versatile Applications

Perfect for A3 envelopes, Large certificates 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 - 12.76" × 18.03" in imperial units.

Universal Compatibility

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

FAQ

C3 Questions & Answers

Common questions about C3 paper size and its applications.

What are the exact dimensions of C3?

C3 measures exactly 324 × 458 millimeters or 12.76 × 18.03 inches.

What is C3 commonly used for?

C3 is commonly used for A3 envelopes, Large certificates, Photo prints among other applications.

What series does C3 belong to?

C3 belongs to the C series, which is part of international paper size standards.

What are the pixel dimensions of C3?

For digital use: 918 × 1298 pixels at 72 DPI, 3827 × 5409 pixels at 300 DPI for high-quality printing.

Can I use C3 for professional printing?

Yes, C3 is perfect for professional printing. It follows international standards and provides excellent print quality for business and creative applications.

Which design software supports C3?

C3 is supported by all major design software including Adobe Creative Suite, Figma, Sketch, Canva, and Microsoft Office applications.