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Product Specifications

Specification Details
Size 3-9/16" x 8-7/8" (#9)
Window Type Double Window
Seal Type Self-Seal (Peel & Seal)
Security Tinted interior
Compatible With QuickBooks, Quicken, most check software
Paper Weight 24# White Wove
Quantities 250, 500, 1000, 2500, 5000
Made In USA
Writing a personal check

Premium Quality Envelopes for Your Business Needs

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Frequently Asked Questions

What size checks fit in #9 double window envelopes?

Standard business checks (3" x 8.5") and most personal checks work perfectly with #9 envelopes. The double windows align with both the recipient address and return address on standard check formats.

Are these envelopes compatible with QuickBooks?

Yes, these #9 double window envelopes are fully compatible with QuickBooks, Quicken, and most accounting software check formats.

What does 'security tinted' mean?

The interior of the envelope has a blue or gray tinted pattern that prevents anyone from seeing check details or account numbers through the envelope.

How does peel and seal work?

Simply remove the protective strip and press the flap down. No moisture or licking required - perfect for high-volume mailings.

Can I use these for invoices or statements?

Absolutely. While designed for checks, these work great for any windowed documents where you want addresses to show through.