If you've ever needed a compact envelope that still handles real business -- checks, donation slips, return mail, personal correspondence -- the #6 3/4 is the size you keep coming back to. It's one of the most widely used envelope sizes in the U.S. At Business Envelopes, we carry the full range: plain white, tinted security, peel and seal, colored wove, and remittance styles, all available with custom printing and free shipping on every order.
What Size Is a 6 3/4 Envelope?
The #6 3/4 envelope measures 3 5/8 inches tall by 6 1/2 inches wide. That's the standard dimension USPS bases its postage rates on for this size. If you're working in metric, the 6 3/4 envelope size in cm is 9.2 x 16.5 cm, or 92 x 165 mm -- useful when setting up a print template or coordinating with an overseas vendor.
You'll see it searched as "6 3 4 envelope" or "envelope 6 3/4" depending on how someone types the fraction. It's also sometimes called a monarch envelope in office supply contexts, though that usage is loose. What matters is the physical footprint: 3 5/8 x 6 1/2 inches, compact enough to nest inside a #10 but spacious enough to hold a folded letter or check.
What Are 6 3/4 Envelopes Used For?
The #6 3/4 hits a sweet spot. It's small enough to slip inside a standard #10 envelope as a return mailer, yet large enough to hold a folded 8.5 x 11 letter, a personal check, or a remittance stub. That versatility is why this size shows up across so many different industries and mailing programs.
Common uses include:
- Church offering envelopes and nonprofit donation return mail
- Business reply and payment return envelopes enclosed in outgoing #10s
- Fundraiser response envelopes for schools, clubs, and community organizations
- Client correspondence for financial advisors, real estate offices, and insurance agencies
- Personal check mailing and cash budgeting envelopes
How to Fold a Letter for a 6 3/4 Envelope
Fold your standard 8.5 x 11 sheet into three equal horizontal sections. Bottom third up first, then top third down over it. That leaves you with a folded panel around 3 1/2 inches tall that slides cleanly into the envelope without forcing it. If you're using a window envelope, position the address block in the bottom third before folding so it lines up correctly with the window once the letter's inside.
Types of 6 3/4 Envelopes We Carry
White Envelopes with Gum Flap
The everyday standard. Clean white wove stock, moistenable gum flap, and available with custom printing. These are what most offices and organizations stock for outgoing and return mail across the board.
White Tinted Security Envelopes
The interior carries a tinted privacy pattern that blocks contents from showing through when the envelope is held up to light. Right choice for checks, personal documents, or anything sensitive. Identical appearance from the outside.
White Tinted Peel and Seal Envelopes
Same tinted security lining, different closure. Pull the release strip, press the flap down, sealed. No moisture needed. If you're running a high-volume mailing program, our self-seal envelopes follow the same system across multiple sizes so you can standardize your process.
Starburst Colored Envelopes (Peel and Seal)
Bold color pattern designed to stand out in a mail pile. Used mostly for fundraiser mailers and direct mail campaigns where open rate matters. Available with full-color custom printing on the front.
Colored Wove Envelopes
A range of wove color options for when plain white doesn't reflect your brand or organization. The wove texture gives them a more tactile, finished feel. Good fit for professional services, membership organizations, and event-based mailings.
6 3/4 Remittance Envelopes
Same outer dimension as the standard #6 3/4 but with an extended 3 1/2-inch wallet flap. That extra flap is designed for printing a tear-off donation form, payment stub, or gift designation directly on the envelope, so no separate insert is needed. This is the version churches, nonprofits, schools, and membership organizations use for annual appeals, pledge drives, and dues collection.
Custom Printing on 6 3/4 Envelopes
Every style in our #6 3/4 lineup supports custom printing. What you can add:
- Return address and organization name
- Full-color logo and brand elements
- Taglines, campaign messaging, or mailing indicia
- Remittance flap forms, tear-off stubs, and gift designations
Custom-printed envelopes reinforce brand recognition on every piece of outgoing mail, and bulk pricing kicks in as quantities increase. If you're planning a high-volume order, you can request a custom quote here and we'll price it out based on your exact specs and quantities. For a look at other sizes that support the same printing options, browse our full envelope size catalog.
Free Shipping on Every Order
All orders across the contiguous 48 states ship free with no order minimums. Single box or full pallet of custom-printed remittance envelopes, no shipping charge either way. Window envelopes, colored envelopes, and every other size in our catalog ships the same way.
Frequently Asked Questions
Q1: What is a 6 3/4 envelope called?
- A 6 3/4 envelope is a standard commercial envelope size, commonly used for various types of business correspondence. It's also often referred to as a "monarch" envelope.
Q2: What size is a 6 3/4 envelope?
- The typical 6 3/4 envelope size in inches is 3 5/8" x 6 1/2". It's also equivalent to 92 x 165 mm or 9.2 x 16.5 cm.
Q3: How can I print on a 6 3/4 envelope?
- We offer 6 3/4 envelope printing services. You can customize your envelopes with your logo, return address, or any other branding element.
Q4: How to fold a letter for a 6 3/4 envelope?
- Usually, you'll need to fold your standard letter into thirds to fit into a 6 3/4 envelope. Make sure the address on the letter is facing the envelope's window if one is present.
Q5: Can I get 6 3/4 envelopes with my logo printed on them?
- Yes. All styles support custom printing: logos, return addresses, taglines, and campaign messaging. Bulk pricing applies as a quantity scale. Request a quote for larger orders.