C Paper Size in Pixels Converter
Welcome to the most accurate C Paper Size in Pixels Converter. The C Series (defined by ISO 269) is primarily used for envelopes designed to hold A Series paper. Whether you are designing a C4 envelope for an A4 document or creating digital assets for C5 mailers, this tool provides exact pixel dimensions at any resolution.
What Fits Where? The Envelope Guide
The C Series was created specifically to house A Series paper. The logic is simple: A C-series envelope is slightly larger than its A-series counterpart, allowing the paper to fit inside without folding.
-
C4 Envelope (229 x 324 mm): Designed to hold one standard A4 sheet unfolded. This is the standard for business contracts and magazines.
-
C5 Envelope (162 x 229 mm): Designed to hold an A5 sheet unfolded, or an A4 sheet folded in half once.
-
C6 Envelope (114 x 162 mm): Designed to hold an A6 sheet (postcard size), or an A4 sheet folded into quarters.
Technical Note: The area of a C series sheet is the geometric mean of the A and B series sheets of the same number. For example, the area of C4 is the geometric mean of the areas of A4 and B4.
C Series Paper Size Chart (Dimensions)
Below is the complete list of C Series paper sizes converted into millimeters and inches.
| C Paper Size | inches | Millimeters |
|---|---|---|
| C0 | 36.1 x 51.1 inches | 917 x 1297 mm |
| C1 | 25.5 x 36.1 inches | 648 x 917 mm |
| C2 | 18 x 25.5 inches | 458 x 648 mm |
| C3 | 12.8 x 18 inches | 324 x 458 mm |
| C4 | 9 x 12.8 inches | 229 x 324 mm |
| C5 | 6.4 x 9 inches | 162 x 229 mm |
| C6 | 4.5 x 6.4 inches | 114 x 162 mm |
| C7 | 3.2 x 4.5 inches | 81 x 114 mm |
| C8 | 2.2 x 3.2 inches | 57 x 81 mm |
| C9 | 1.6 x 2.2 inches | 40 x 57 mm |
| C10 | 1.1 x 1.6 inches | 28 x 40 mm |
C Paper Sizes At Common Resolutions
This is a list for C paper sizes in pixels at most common resolutions (72, 96, 150 and 300)
| C Paper Size | 72 DPI | 96 DPI | 150 DPI | 300 DPI |
|---|---|---|---|---|
| C0 | 2599 x 3677 px | 3466 x 4902 px | 5415 x 7659 px | 10831 x 15319 px |
| C1 | 1837 x 2599 px | 2449 x 3466 px | 3827 x 5415 px | 7654 x 10831 px |
| C2 | 1298 x 1837 px | 1731 x 2449 px | 2705 x 3827 px | 5409 x 7654 px |
| C3 | 918 x 1298 px | 1225 x 1731 px | 1913 x 2705 px | 3827 x 5409 px |
| C4 | 649 x 918 px | 866 x 1225 px | 1352 x 1913 px | 2705 x 3827 px |
| C5 | 459 x 649 px | 612 x 866 px | 957 x 1352 px | 1913 x 2705 px |
| C6 | 323 x 459 px | 431 x 612 px | 673 x 957 px | 1346 x 1913 px |
| C7 | 230 x 323 px | 306 x 431 px | 478 x 673 px | 957 x 1346 px |
| C8 | 162 x 230 px | 215 x 306 px | 337 x 478 px | 673 x 957 px |
| C9 | 113 x 162 px | 151 x 215 px | 236 x 337 px | 472 x 673 px |
| C10 | 79 x 113 px | 106 x 151 px | 165 x 236 px | 331 x 472 px |
Explore More Paper Size Converters
Need to calculate dimensions for other standard formats? Check out our comprehensive guides and pixel converters for all major global standards:
-
A Paper Size In Pixels – The most common international standard for documents, including A4, A3, and A5.
-
B Paper Size In Pixels – Often used for posters, books, and specialty printing.
-
US Paper Size In Pixels – Dimensions for North American standards like Letter, Legal, and Ledger.
Frequently Asked Questions (FAQ)
What is the size of a C4 envelope in pixels?
At standard screen resolution (72 PPI), a C4 envelope is 649 x 918 pixels. For high-quality printing (300 DPI), it is 2705 x 3827 pixels.
Which envelope size fits A4 paper?
If you want to send A4 paper unfolded, you need a C4 envelope. If you fold the A4 paper in half, use a C5 envelope. If you fold it into thirds (standard letter), use a DL envelope.
Is C5 bigger than A5?
Yes. C5 (162 x 229 mm) is slightly larger than A5 (148 x 210 mm), which allows the A5 paper to slide inside easily with a small margin.