C4 Window Envelopes

A windowed envelope is an envelope with a transparent address panel in the front. The panel is positioned so information printed on the enclosed document can show through when the contents are inserted correctly. These envelopes are used for professional correspondence, promotional mailings, office communications, and integrated stationery packages, with design and printing options available to match business branding.

The standard business envelope address window measures 4.5 inches by 1.125 inches according to the provided industry specification. Exact envelope dimensions vary by format, with standard business sizes available from #6 1/4 through #14. The appropriate size depends on the enclosed document, mailing format, address placement, and applicable USPS requirements.

Available standard business envelope sizes include #6 1/4, #6 3/4, #7, #7 3/4, #8 5/8, #9, #10, #11, #12, and #14. The listed dimensions range from 3.5 inches by 6 inches for #6 1/4 to 5 inches by 11.5 inches for #14. Request an estimate to discuss the correct format for your application.

Yes. Custom printing options range from basic black and white to one-colour, two-colour, multi-colour, and full-colour designs. Foil embossing is also available. Artwork can support corporate branding, professional correspondence, marketing mailings, or a coordinated stationery package with matching business cards and letterhead.

USPS requirements provided for these envelopes include rectangular shape for mail pieces 1/4 inch thick or less, with minimum dimensions of 3.25 inches high and 5 inches long. Thickness requirements also apply: 0.007 inch for pieces up to 4.25 inches high, and 0.009 inch when height exceeds 4.25 inches or length exceeds 6 inches.

Yes. Envelopes can be bundled into a complete corporate identity package with matching business cards and letterhead. This approach helps maintain consistent visual presentation across correspondence and promotional materials. Design support can accommodate straightforward black-and-white layouts, full-colour custom printing, and foil embossing where appropriate for the requested package.