Description

These #14 Western Sulphite® window envelopes measure 5" x 11-1/2" and are made from 24 lb white sulphite paper with a professional vellum finish. Designed for larger business mailings, statements, invoices, reports, and official documents, these commercial envelopes include a poly “C” window for clear address visibility.

Key Product Details

Envelope Style: #14 commercial window envelope
Size: 5" x 11-1/2"
Material: 24 lb white sulphite paper
Finish: Vellum finish with 92% brightness
Window: Poly “C” window
Window Size: 1-1/8" x 4-1/2"
Window Position: 7/8" from left, 1/2" from bottom
Seal: Traditional remoistening seal
Seams: Diagonal seams
Flap: Flap down
Certification: SFI Certified
Quantity: 500 envelopes per box
Manufacturer Item Number: 3609

Large Commercial Window Envelopes for Business Mailings

Western Sulphite® #14 window envelopes are a dependable option for businesses, offices, schools, accounting departments, medical offices, legal firms, municipalities, and other organizations that mail larger documents or high-volume correspondence. The 5" x 11-1/2" format provides extra room compared to smaller commercial envelopes, while the 24 lb white sulphite paper gives outgoing mail a clean, professional appearance.

Each envelope features diagonal seams, a flap-down design, and a traditional remoistening seal. The poly window is positioned for standard address visibility, helping streamline mail preparation when documents are printed with the address already aligned.

Printer Compatibility Note: This window envelope is not recommended for laser printers, as heat from laser printing may cause the poly window to shrink or warp.

Item Number	3609
Envelope Size	5" x 11-1/2"
Paper / Material	24 lb white sulphite paper
Window Details	Poly “C” window, 1-1/8" x 4-1/2", positioned 7/8" from left and 1/2" from bottom
Seal / Construction	Remoistening seal, diagonal seams, flap down
Finish / Certification	Vellum finish, 92% brightness, SFI Certified
Quantity	500 envelopes per box / 2,500 per carton
Printer Compatibility	Not recommended for laser printers due to heat exposure near the poly window

Need custom printed envelopes? Advanced Filing Concepts can help businesses order stock envelopes with custom printing for professional branded mailings.