While most of the world uses the ISO A-series, the United States and a few other countries follow their own paper size standards. If you're designing for American audiences or printing in the US, understanding these dimensions is essential.
This guide covers all standard US paper sizes and their pixel equivalents for print design.
US Paper Size System
Unlike the mathematically elegant A-series, US paper sizes evolved from traditional manufacturing practices. The most common sizes—Letter and Legal—don't follow a consistent aspect ratio system.
The ANSI (American National Standards Institute) later standardized larger architectural and engineering sizes with more logical proportions.
Quick Reference Table
| Size | Inches | mm | Pixels (300 DPI) | Common Uses |
|---|---|---|---|---|
| Letter | 8.5 × 11 | 216 × 279 | 2550 × 3300 | Standard documents |
| Legal | 8.5 × 14 | 216 × 356 | 2550 × 4200 | Legal documents |
| Tabloid | 11 × 17 | 279 × 432 | 3300 × 5100 | Small posters, newspapers |
| Ledger | 17 × 11 | 432 × 279 | 5100 × 3300 | Spreadsheets (landscape) |
| Executive | 7.25 × 10.5 | 184 × 267 | 2175 × 3150 | Memos, letters |
| Half Letter | 5.5 × 8.5 | 140 × 216 | 1650 × 2550 | Booklets, flyers |
Letter Size (8.5 × 11 inches)
Letter is the most common paper size in the United States and Canada. It's the default for business documents, academic papers, and personal printing.
Dimensions:
- 8.5 × 11 inches
- 216 × 279 mm
- 2550 × 3300 pixels at 300 DPI
Common applications:
- Business correspondence
- School assignments
- Resumes and CVs
- Internal documents
- Standard forms
→ Create a Letter size canvas (300 DPI)
→ Create a Letter size canvas (150 DPI)
Letter vs A4
Letter and A4 are similar but not identical:
| Dimension | Letter | A4 |
|---|---|---|
| Width | 8.5" (216 mm) | 8.27" (210 mm) |
| Height | 11" (279 mm) | 11.69" (297 mm) |
A4 is narrower and taller. When designing for international audiences, consider the differences in margins and layout.
Legal Size (8.5 × 14 inches)
Legal size paper is 3 inches longer than Letter. It's primarily used for legal documents, contracts, and anything requiring extra page length.
Dimensions:
- 8.5 × 14 inches
- 216 × 356 mm
- 2550 × 4200 pixels at 300 DPI
Common applications:
- Legal contracts
- Court documents
- Real estate forms
- Insurance documents
- Long tables and spreadsheets
→ Create a Legal size canvas (300 DPI)
Tabloid / Ledger (11 × 17 inches)
Tabloid and Ledger are the same size—the difference is orientation. Tabloid is portrait (11 × 17), while Ledger is landscape (17 × 11).
Dimensions:
- 11 × 17 inches
- 279 × 432 mm
- 3300 × 5100 pixels at 300 DPI
Common applications:
- Small posters
- Newspaper tabloids
- Architectural drawings (draft)
- Large spreadsheets
- Folded brochures
- Presentation materials
→ Create a Tabloid canvas (portrait, 300 DPI)
→ Create a Ledger canvas (landscape, 300 DPI)
Executive (7.25 × 10.5 inches)
Executive is slightly smaller than Letter, traditionally used for executive stationery and formal correspondence.
Dimensions:
- 7.25 × 10.5 inches
- 184 × 267 mm
- 2175 × 3150 pixels at 300 DPI
Common applications:
- Executive letterhead
- Memos
- Personal correspondence
- Upscale invitations
→ Create an Executive size canvas (300 DPI)
Half Letter (5.5 × 8.5 inches)
Half Letter is exactly half of Letter size, created by cutting Letter paper in half. It's popular for booklets and compact documents.
Dimensions:
- 5.5 × 8.5 inches
- 140 × 216 mm
- 1650 × 2550 pixels at 300 DPI
Common applications:
- Booklets and pamphlets
- Event programs
- Pocket-sized guides
- Half-fold brochures
- Instruction manuals
→ Create a Half Letter canvas (300 DPI)
ANSI Sizes
The ANSI standard provides a more systematic approach to larger paper sizes, commonly used in engineering and architecture.
ANSI A (Letter) - 8.5 × 11 inches
Same as Letter size—the base of the ANSI system.
→ Create an ANSI A canvas
ANSI B (Tabloid) - 11 × 17 inches
Same as Tabloid/Ledger—double the size of ANSI A.
→ Create an ANSI B canvas
ANSI C - 17 × 22 inches
Double the size of ANSI B, used for technical drawings.
Dimensions:
- 17 × 22 inches
- 432 × 559 mm
- 5100 × 6600 pixels at 300 DPI
Common applications:
- Engineering drawings
- Architectural plans
- Technical diagrams
- Large presentations
→ Create an ANSI C canvas (300 DPI)
ANSI D - 22 × 34 inches
Double the size of ANSI C.
Dimensions:
- 22 × 34 inches
- 559 × 864 mm
- 6600 × 10200 pixels at 300 DPI
→ Create an ANSI D canvas (300 DPI)
ANSI E - 34 × 44 inches
The largest standard ANSI size.
Dimensions:
- 34 × 44 inches
- 864 × 1118 mm
- 10200 × 13200 pixels at 300 DPI
→ Create an ANSI E canvas (300 DPI)
Architectural Sizes
Architects often use a slightly different set of sizes with a 3:4 aspect ratio:
| Size | Inches | Pixels (300 DPI) |
|---|---|---|
| Arch A | 9 × 12 | 2700 × 3600 |
| Arch B | 12 × 18 | 3600 × 5400 |
| Arch C | 18 × 24 | 5400 × 7200 |
| Arch D | 24 × 36 | 7200 × 10800 |
| Arch E | 36 × 48 | 10800 × 14400 |
→ Create an Arch A canvas
→ Create an Arch B canvas
→ Create an Arch C canvas
Envelope Sizes
US envelopes have their own sizing system:
| Envelope | Dimensions | Fits |
|---|---|---|
| #10 (Business) | 4.125 × 9.5" | Letter folded in thirds |
| #9 | 3.875 × 8.875" | Letter folded in thirds |
| A2 | 4.375 × 5.75" | Quarter-fold cards |
| A7 | 5.25 × 7.25" | 5×7 cards/invitations |
| A9 | 5.75 × 8.75" | Half Letter |
Business Envelope #10 (4.125 × 9.5 inches)
The standard envelope for business correspondence.
→ Create a #10 envelope template (300 DPI)
Photo Print Sizes
Standard US photo print sizes:
| Size | Inches | Pixels (300 DPI) |
|---|---|---|
| Wallet | 2.5 × 3.5 | 750 × 1050 |
| 4×6 | 4 × 6 | 1200 × 1800 |
| 5×7 | 5 × 7 | 1500 × 2100 |
| 8×10 | 8 × 10 | 2400 × 3000 |
| 11×14 | 11 × 14 | 3300 × 4200 |
→ Create a 4×6 photo canvas
→ Create a 5×7 photo canvas
→ Create an 8×10 photo canvas
Print Specifications
When preparing files for US printing:
DPI recommendations:
- 300 DPI: Standard print quality
- 150 DPI: Draft or large format
- 72 DPI: Screen only (not for print)
Bleed: Add 0.125" (3.175 mm) on all sides for professional printing.
Safe area: Keep important content at least 0.25" from edges.
Letter with Bleed
→ Create a Letter canvas with bleed (300 DPI)
Color Specifications
For US commercial printing:
- CMYK: Required for offset printing
- RGB: For digital printing and online
- Pantone: For brand-specific colors
Most US printers prefer PDF files with fonts embedded and images at 300 DPI minimum.
Common Mistakes
- Assuming A4 = Letter: They're different sizes—designs may not fit correctly
- Forgetting bleed: Professional prints require bleed margins
- Low resolution: 72 DPI images look terrible in print
- Wrong color mode: RGB prints differently than expected—use CMYK for offset
International Considerations
If designing for both US and international audiences:
- Create separate versions for Letter and A4
- Use PDF formats with embedded fonts
- Include crop marks for printers
- Specify which paper size is intended
Summary
US paper sizes center around Letter (8.5 × 11") for everyday documents, with Legal, Tabloid, and ANSI sizes covering specialized needs.
Most used sizes:
- Letter: 8.5 × 11" (2550 × 3300 px)
- Legal: 8.5 × 14" (2550 × 4200 px)
- Tabloid: 11 × 17" (3300 × 5100 px)
- Half Letter: 5.5 × 8.5" (1650 × 2550 px)
Start with the correct canvas dimensions and your US print projects will come out perfectly every time.
