Bottom Flap Reverse Window Envelopes

Web Seam & Wood Grain tint

Reverse flap envelope is often required when the mail to address that shows through the window is on the bottom of the document that is to be inserted.

Reverse flap envelopes have mail inserted from the bottom rather than the top. The orientation of the address window is typically on the left side of the envelope. Bottom flap envelopes, due to the design and orientation, flow and run much better in envelope inserting machines. While most folding and inserting machines, such as those by Formax, can use a standard top flap envelope, bottom flap envelopes are preferred. These types of envelopes are perfect for mailing bills, receipts, invoices, promotional material and more.

Number & Size

Number Size
6 1/4 1-1/8 x 4-1/2
6 1/4 3/4L 1/2B
6-3/4, 7, 7-3/4 1-1/8 x 4-1/2
6-3/4, 7, 7-3/4 7/8L 1/2B
Monarch 1-1/8 X 4-1/2
Monarch 7/8L 1/2B
9, 10, 11, 12, 14 1-1/8 X 4-1/2
9, 10, 11, 12, 14 7/8L 1/2B
8-5/8 1 x 4
8-5/8 1L 3/4B


Wood Grain Tint

Protect your privacy when sending checks, forms or other sensitive information.

Protect your privacy when sending checks, forms or other sensitive information. The tinted pattern inside discourages reading sensitive information through the envelope. Some of the most common scenarios in which security envelopes are used include: bank or tax statements, legal processing, Mailed checks, health documents, very personal correspondence, offers that contain sensitive information and anything with a social security number, account number or health information printed in the contents.

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