#10 envelope size
The standard #10 envelope size is 241.3 × 104.8 mm (9.5 × 4.125 inches), or 2850 × 1237 pixels at 300 DPI.
Last updated:
Specifications
| Spec | Value |
|---|---|
| Dimensions (px) | 2850 × 1237 px |
| Aspect ratio | 9.5:4.125 |
| Size (inches) | 9.5 × 4.125 in |
| Size (cm) | 24.13 × 10.48 cm |
| Size (mm) | 241.3 × 104.8 mm |
| Supported formats | PDF, PNG, TIFF |
| Color mode | CMYK |
#10 Envelope in pixels at different DPI
| Resolution | Width | Height | Use case |
|---|---|---|---|
| 72 DPI | 684 px | 297 px | Screen / web |
| 96 DPI | 912 px | 396 px | Windows default |
| 150 DPI | 1425 px | 619 px | Draft print / large posters |
| 300 DPI | 2850 px | 1237 px | High-quality print |
Design at this size with Moda
Start with a canvas pre-set to 2850×1237px and let AI generate your design.
Create a #10 envelope →Design tips
The #10 envelope is 9.5×4.125 inches (241.3×104.8mm) — the standard business envelope in the United States. It fits a Letter-size sheet folded in thirds. At 300 DPI, the printable area is 2850×1237 pixels. It's used for business correspondence, invoices, checks, and direct mail.
- •Fits a Letter-size sheet folded in thirds. The most common business envelope in the US.
- •Account for the address window position (if applicable) and USPS barcode area in your design.
- •No bleed — envelope printing is inset from the edges. Provide a flat template at exact dimensions.
What you need to know
The #10 envelope is the standard business envelope in the US, used for virtually all professional correspondence. It's designed to hold a standard Letter-size (8.5×11") sheet folded into thirds (each fold panel is ~3.67" tall). The envelope has a flap on the long edge.
When designing custom #10 envelopes for printing, the layout must account for the address window (if applicable), return address position, and USPS postal barcode area. Standard return address placement is the upper-left corner. If using a window envelope, the window is typically positioned 0.875" from the left and 0.5" from the bottom.
Custom printed envelopes don't use bleed in the traditional sense — the print area is typically inset from all edges. Most printers can print the full face of the envelope but not under the flap. Provide your design as a flat template at the exact envelope dimensions with any fold lines marked.
How to create a #10 envelope at the right size
- 1Open Moda and create a new canvas at 2850×1237 pixels.
- 2Design your #10 envelope using AI generation or start from a blank canvas.
- 3Export as PDF and upload to your platform.
Frequently asked questions
What size is a #10 envelope?
9.5×4.125 inches (241.3×104.8mm). It's the standard US business envelope, designed to hold a Letter-size sheet folded in thirds.
What paper fits in a #10 envelope?
A standard 8.5×11" Letter sheet folded into thirds (each panel ~3.67" tall). Also fits checks, invoices, and similar documents.
Sources
Specs last verified: March 19, 2026. Dimensions may change as platforms update their requirements.