Member's Mark Envelope #9, Double Window, 500 ct.

Member's Mark #9 double-window business envelopes make it easy to send invoices, forms, and checks with both the return address and mailing address displayed through clear windows.

Double windows that streamline business mailings

The double-window layout is made for documents where the recipient and return addresses are already printed on the insert. Showing both addresses through the windows helps reduce manual addressing and labeling, supports a clean, professional look, and helps lower stuffing errors by keeping address placement consistent.

These envelopes are commonly used for invoices and statements, including billings that may include remittance stubs or checks.

Self-adhesive closure for fast sealing

Each envelope features a self-adhesive seal for efficient processing. Pull off the strip to reveal the adhesive closure and seal—no moisture required.

Privacy tint to help keep contents from showing through

A privacy tint helps keep your communications confidential by making contents less readable through the envelope, which is especially useful when mailing sensitive business paperwork.

Window measurements and placement

• Top window: 7/8" x 3-1/2"; positioned 3/8" from the edge and 2-1/4" from the bottom.
• Bottom window: 1" x 4"; positioned 5/8" from the edge and 5/8" from the bottom.

At-a-glance details

• Envelope size: 3-7/8" x 8-7/8" (#9).
• Closure type: self-adhesive (peel-and-seal); no moisture required.
• Quantity: 500 envelopes per pack.
• Window style: double clear windows for mailing and return addresses.
• Privacy feature: privacy tint.
• Typical uses: invoices, professional forms, checks, and important paperwork.
• Model #: MM09DW.

Member’s Mark Made Without Commitment™

This item meets our Member’s Mark Made Without Commitment™: Our Member’s Mark Made Without Commitment makes it easier to know what is not in our products, so members can feel better about what is. We simplify the choice for our members by setting a high brand standard for the products they bring into their homes. This isn’t just a list of ingredients, it’s our commitment to simpler ingredients that reflect our members' values. And we deliver this without compromising taste, performance, or value. This means that this item doesn’t contain the 40+ ingredients on our Made Without Commitment list like High Fructose Corn Syrup, Phthalates, Talc, Certified Synthetic Colors/ FD&C Colors, and Formaldehyde. See the full list of ingredients here: https://www.samsclub.com/cp/members-mark-goals/30001929. 

Frequently Asked Questions

What is the Member's Mark Envelope #9, Double Window used for?

Designed for mailing business documents such as invoices, forms, checks, and other paperwork, with two clear windows that display mailing and return addresses.

How does the self-adhesive closure work on these envelopes?

Peel off the release strip to expose the adhesive, then press to seal. No moisture is required.

Self-seal vs. regular (lick-to-seal) envelopes—what’s the benefit?

A self-adhesive seal closes by pressing after peeling the strip, which can be faster and avoids moistening the flap.

What size are these #9 double-window envelopes?

Each envelope measures 3-7/8" x 8-7/8".

Do these envelopes have a privacy tint?

They have a privacy tint to help keep contents from showing through the envelope paper.

What are the window sizes on the Member's Mark #9 Double Window envelope?

Top window: 7/8" x 3-1/2". Bottom window: 1" x 4".

Where are the windows placed on the envelope?

Top window: 3/8" from edge and 2-1/4" from bottom. Bottom window: 5/8" from edge and 5/8" from bottom.

How many envelopes are included in this pack?

This pack includes 500 envelopes.

What is the model number for this envelope?

Model # MM09DW.