#10 Envelopes
Custom #10 Envelopes (Standard Business Size)
The standard for American business. Our #10 Commercial Envelopes (4 1/8" x 9 1/2") are designed to fit standard letter-sized paper folded in thirds. Whether for invoices, checks, or legal correspondence, we print high-quality custom envelopes that run smoothly through office printers and mailrooms.
1. Choose Your Security
Features a complex interior tint pattern to hide check amounts and SSNs. Essential for HIPAA & Financial privacy.
- Popular: #10 Security Window (EN1030)
- No Window: #10 Security Regular (EN1003)
2. Choose Your Seal
Peel & Seal saves hours on manual mailing—no moisture needed. Gum Seal is best for automatic inserters.
- Popular: #10 Self Seal Window (EN1005)
- Regular: #10 Simple Seal (EN1062)
3. Choose Your Window
Save time addressing. Choose Standard Window for letters or Double Window for QuickBooks & Checks.
- Popular: #10 Standard Window (EN1032)
- Digital: #10 Digital Window (EB1506)
Engineered for High-Volume Automation
We understand that high-volume mailing requires precision. Our standard gummed #10 envelopes are "Machinable" and engineered for compatibility with major automatic insertion equipment (including Pitney Bowes, Neopost, and Bell & Howell).
- Inserter-Safe Flaps: Designed with the correct throat depth and flap angle to prevent jamming during high-speed insertion.
- Laser Safe Wove Paper: Our standard white wove paper is treated to withstand the heat of office laser printers without curling or sealing prematurely.
- USPS Compliant: Every #10 envelope we print meets strict USPS Letter Sizing Standards for aspect ratio and thickness, ensuring you qualify for automation discounts and avoid postage surcharges.
Technical Specifications
| Dimensions | 4 1/8" Height x 9 1/2" Width |
|---|---|
| Fits Document | 8.5" x 11" (Letter Size) - Folded in Thirds (Tri-Fold) |
| Max Thickness | Standard 1/4 inch (approx 3-5 sheets of paper) |
| Printer Compatibility | Safe for Laser and Inkjet Printers (Standard Gum Only) |
Frequently Asked Questions about #10 Envelopes
Where are your #10 envelopes manufactured?
Granite Woods Printing manufactures and prints custom #10 envelopes at our facility in Evanston, IL (Chicago Metro Area). By keeping production local rather than outsourcing overseas, we ensure consistent paper quality, strict color matching, and reliable shipping times across the United States.
Are these envelopes safe for laser printers?
Yes, but you must choose the right seal. Our Standard Gummed #10 Envelopes are 100% laser-safe and heat resistant. We do not recommend running "Peel & Seal" envelopes through laser printers, as the heat can melt the adhesive. If you plan to print on the envelopes yourself, please select the Standard Gum option.
What is the exact size of a #10 envelope?
A standard #10 commercial envelope measures exactly 4 1/8 inches high by 9 1/2 inches wide. It is designed to fit a standard 8.5" x 11" piece of paper folded into thirds (a tri-fold), making it the standard choice for business letters, invoices, and checks.
Do you have envelopes that fit QuickBooks checks?
Yes. For QuickBooks and other accounting software, we recommend our #10 Double Window Envelopes. The top window displays the return address, and the bottom window displays the recipient's address, perfectly aligned to standard check formats to save you time.
What is a "Security Tint" envelope?
Security Tint envelopes feature a complex blue or black pattern printed on the inside. This makes the envelope opaque, preventing anyone from holding it up to the light to read confidential information like check amounts or Social Security numbers.