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C1

C Series

Large envelope size perfect for unfolded A1 documents, architectural drawings, and technical plans requiring professional presentation.

Physical Dimensions
Exact measurements in multiple units for precision printing and design
648 × 917 mm
25.51" × 36.1"
1836 × 2599 pt

Used in desktop publishing software

153 × 216 pc

Traditional typography unit

64.8 × 91.7 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

1837 × 2599 px
150 DPI (Draft Print)

Good quality printing for drafts and proofs

3827 × 5414 px
300 DPI (High Quality Print)

Professional printing standard for high-quality output

7654 × 10827 px
Common Applications
How and where C1 is typically used across different industries and contexts

Business Applications

  • Large document envelopes
Visual Scale
Relative size representation
C1648 × 917mm

Scaled representation (not actual size)

Quick Tools
Size ConverterAll Paper SizesTemplates
Related C Series
Other sizes in the same series
C0C2C3C4C5C6

Technical Standards

Series: C

Aspect Ratio: 1:√2 (1.414)

Standard: ISO 269

Origin: International (ISO)

✦ Features

C1 Paper Size Advantages

Discover the key advantages and applications of C1 paper size for your projects.

Perfect Dimensions

C1 measures 648 × 917 mm, ideal for professional applications.

International Standard

Part of the C series, C1 follows international standards for global compatibility.

Versatile Applications

Perfect for Large document envelopes, Architectural drawings 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 - 25.51" × 36.1" in imperial units.

Universal Compatibility

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

FAQ

C1 Questions & Answers

Common questions about C1 paper size and its applications.

What are the exact dimensions of C1?

C1 measures exactly 648 × 917 millimeters or 25.51 × 36.1 inches.

What is C1 commonly used for?

C1 is commonly used for Large document envelopes, Architectural drawings, Technical plans among other applications.

What series does C1 belong to?

C1 belongs to the C series, which is part of international paper size standards.

What are the pixel dimensions of C1?

For digital use: 1837 × 2599 pixels at 72 DPI, 7654 × 10827 pixels at 300 DPI for high-quality printing.

Can I use C1 for professional printing?

Yes, C1 is perfect for professional printing. It follows international standards and provides excellent print quality for business and creative applications.

Which design software supports C1?

C1 is supported by all major design software including Adobe Creative Suite, Figma, Sketch, Canva, and Microsoft Office applications.