Business envelopes from #6-3/4 reply size to 9x12 flats, in window or closed face, with letterhead printed to match. One stationery system from one Lakeland, Florida building, shipped to all 50 states or fed straight into your mail program.
Recipients make an open-or-toss decision in about two seconds, and the envelope is all they see when they make it. Industry data puts envelope mail open rates between 70 and 90 percent depending on audience and format, against 20 to 25 percent for email. A generic white envelope with a laser-printed return address reads as bulk mail; a printed envelope with your logo, your color, and a window placed exactly where the address shows through reads as something someone meant to send. This page covers the printed stock itself: the envelope sizes and styles, the letterhead that matches them, and the way both get spec'd so they run clean when they hit the mailstream.
#10, 6x9, 9x12, and custom sizes, window or closed face, matched to your letterhead so the logo, the color, and the paper read as one system. One order, one proof, one consistent identity.
Our prepress team checks every envelope layout against current USPS specifications: the barcode clear zone stays open, the address area stays readable, and window placement keeps the address visible. Pretty and mailable are not the same thing; we hold the layout to both.
MPA is a Veteran-Owned Small Business, SOC 2 Type 2 certified, and HIPAA-compliant, with 5.0 stars across 100+ verified Google reviews. Those controls cover every job we run, including a box of letterhead.
Stationery is also the rare print product that works twice. The envelope does the outside job: it gets the piece opened, protects what is inside, and carries the brand to the mailbox. The letterhead does the inside job: it frames the message, signals that the organization is established, and makes even routine correspondence look deliberate. When the two are printed as a set, on the same stock family with the same color standards, every invoice, appeal, proposal, and notice that leaves the office reinforces the same identity.
And because the same building that prints the stock also runs mail every day, the envelopes are spec'd by people who know what happens to them next: which stocks feed cleanly through inserting equipment, where a window has to sit so the address never slips out of view, and what keeps a piece eligible for automation rates. If your envelopes have ever come back from a mail house with a problem the printer should have caught, that is the gap this page exists to close.
Every size below is a stock format we print day in and day out, in window or closed face. The specialty list after the grid covers announcements, legal sizes, and full custom conversions.
4.125" x 9.5" · closed face
The standard business envelope and the one that dominates business mail. A letter-size sheet folded in thirds fits it exactly, and it meets USPS automation requirements without modification.
Best for: letters, proposals, everyday correspondence.
4.125" x 9.5" · clear panel
The address prints once, on the document, and shows through the window, so the envelope never needs separate addressing. The workhorse of invoices and statements, with custom window placement available.
Best for: invoices, statements, document mailings.
3.875" x 8.875" · fits inside a #10
Sized to nest inside a #10 without folding, which is why it is the engine of every appeal and remittance package: the recipient pulls it out, drops in the reply, and sends it back.
Best for: reply envelopes, donation and payment returns.
3.625" x 6.5" · compact reply
The compact reply and remittance format. Smaller than a #9, it suits payment stubs and donation slips where the return piece is a card rather than a full sheet.
Best for: remittance programs, payment coupons.
6" x 9" · letter or flat
For booklets, brochures, and half-fold letters that should not fold down to #10 size. Depending on thickness it mails as a letter or a flat, and we flag which before you commit.
Best for: booklets, catalogs, half-fold letters.
9" x 12" · mails as a flat
Full-size documents travel unfolded: contracts, reports, and anything that should arrive flat. A printed 9x12 turns a plain mailer into a branded delivery that arrives looking like it matters.
Best for: contracts, reports, unfolded documents.
Those six are the staples, not the limit. The commercial range runs from the #6-3/4 up through #11, #12, and #14 for legal and oversized correspondence, plus 10x13 flats for documents with bulk. A-series announcement envelopes, A2 through A10, carry invitations, cards, and event mailings; their squarer proportions read as personal rather than transactional, and for nonprofit fundraising an A7 often outperforms a #10 for exactly that reason. Square envelopes are available too, with one honest caution: USPS treats them as nonmachinable, so they carry a postage surcharge.
Styles layer on top of size. Window or closed face is the first call. Then flap and seal: gummed or self-seal, with self-seal skipping the moisture step entirely. Then the interior: a security tint, in a standard crosshatch or a custom pattern matched to your brand colors, keeps statements, healthcare documents, and tax forms from being read through the paper. Stocks run from the 24lb white wove that is the industry default, through 28lb for a noticeably sturdier feel, to colored wove and kraft when the envelope itself should carry the brand.
And when the off-the-shelf range does not fit, envelopes can be converted: manufactured from flat sheets specifically for your order, which opens up custom sizes, window placements, flap styles, and papers not available in stock formats. Stock envelopes overprinted with your design are faster and more economical for standard sizes; conversion is the answer when the design demands a configuration the shelf does not hold.
One sizing rule worth knowing before you commit to a format: USPS prices by shape. A letter-size piece runs from 3.5 by 5 inches up to 6.125 by 11.5 inches, with length divided by height falling between 1.3 and 2.5; anything larger travels as a flat at a higher rate. The #10 sits comfortably inside those limits, which is part of why it dominates business mail, and it is the kind of check our prepress team runs on every envelope layout before it prints.
Not sure which size fits the contents? Tell us what goes inside and we'll spec the envelope around it with the quote.
Get an Envelope Quote →Letterhead is the inside half of the stationery system: the masthead, the brand colors, and the paper your correspondence lives on. Print it to match the envelope and the whole package reads as one decision instead of two purchases.
the professional default
A clean, smooth sheet gives the masthead a crisp edge and keeps long correspondence easy to read. The natural partner to a white wove envelope, so page and carrier feel like one piece.
Best for: formal communication, everyday business letters.
felt in the hand
Texture adds a tactile signal that registers before a word is read. The right call when the letter itself is part of the impression: engagement letters, proposals, donor correspondence.
Best for: premium brands, client-facing correspondence.
sustainability on paper
A recycled sheet states a commitment without a single line of copy. Pair it with a kraft envelope and the whole package carries the same message from the outside in.
Best for: nonprofits, sustainability-minded brands.
CMYK, edge to edge
Full-color printing handles logos, brand bars, and footer blocks with photographic fidelity, and consistent color standards keep this month's reorder matching last year's box.
Best for: bold brand systems, multi-color identities.
raised print
Raised print that mimics engraving: resinous powder fuses over the wet ink and the logo sits up off the sheet. A classic for stationery sets where letterhead, envelopes, and business cards share a matching raised mark.
Best for: law firms, financial services, traditional brands.
metallic accents
A heated die presses metallic foil onto the sheet for a reflective, high-contrast mark, and embossing adds relief you can feel. Reserved treatments that make a masthead unmistakably deliberate.
Best for: flagship stationery, executive correspondence.
The matching system is simple discipline, not magic: the same logo art, the same color standards, and a stock pairing chosen so the letterhead sheet and the envelope feel related in the hand. Pantone-consistent color is what holds the system together across reorders and across products; it is the difference between a brand color and a color that is usually close. Design alignment across your materials, letterhead, envelopes, and business cards together, is what makes the impression uniform every time the brand shows up.
Starting from scratch, or rebuilding from a logo file? Our in-house design team can build the letterhead and envelope artwork to print spec, and we provide templates so every element lands exactly where it should: masthead clear of the trim, footer clear of the fold, and the envelope's address areas left open where the mailstream needs them. You approve a digital proof before anything runs, on the first order and on every reorder after it.
Torn between two sheets? Ask for paper samples with your quote and decide by hand, not by adjective.
Get a Letterhead Quote →Envelopes carry the brand to the mailbox, letterhead carries it through the letter, and business cards carry it out of the room. Ordered together, they share artwork, color standards, and a proof cycle, so the system stays consistent instead of drifting one reorder at a time.
First contact. The logo, the return address block, and the stock decide whether the piece gets opened or tossed, and a letter-size sheet folded in thirds drops into a #10 exactly.
You are here: printed envelopes, reply size to 9x12.
The message arrives on a sheet that frames it: masthead, brand color, footer block. Matched stock and color mean the letter looks like it belongs in the envelope it came from.
You are here: matching letterhead, smooth to textured.
The third piece of the set. Same logo, same color standards, same paper sensibility, in the one format that lives in a pocket after the meeting ends.
Go to: Business Card Printing →
One practical note from the proof room: order the system together even if the quantities differ. Matching three pieces printed months apart means matching three different press runs; matching them in one order means one color standard, one paper decision, and one approval. Reorders then hold the line, because the spec is already proven.
Stationery pricing moves on four levers. Every quote is itemized line by line so you can see each one, and it usually comes back within one business day.
the biggest lever
Setup is the fixed part of any run, so the per-piece cost steps down as the count climbs. A year of envelopes ordered once beats four small reprints, and reorders price cleaner than first runs.
Price moves with: how many pieces run together.
window vs. closed face
A #10 and a 9x12 are different animals, and a window, a custom window position, or a security tint each adds a step. Converted custom envelopes carry more of the quote than stock formats.
Price moves with: the envelope you spec.
corner card to full bleed
A one-color return address is the light end; full-color coverage across the face is the heavy end. Thermography and foil stamping add passes, and variable data adds a data step.
Price moves with: how much the design asks of the press.
weight & texture
Smooth white wove is the baseline; heavier weights, textured sheets, and recycled or specialty stocks carry more of the quote. The paper is the raw material, and the hand feel is what you are buying.
Price moves with: the sheet under the masthead.
Why a quote instead of a price grid? Because stationery has more combinations than any grid can hold, and the best version of your order is usually one substitution away. A window envelope quoted with a custom window position gets a question back: does the standard position work for your statement layout? A short letterhead run on a specialty sheet gets a sample suggestion first. The quote desk catches those, itemizes every line so nothing hides in a bundle, and answers within one business day.
Two budgeting notes worth knowing before you ask. Quantity is kind to envelopes: per-piece value improves sharply once an order reaches four figures, which is why most businesses order a year at a time. And postage is its own line, set by the size, weight, and thickness of the finished piece rather than by the printing, so a well-chosen envelope size protects the postage budget on every mailing it ever carries.
Itemized by size, stock, ink coverage, and quantity. Usually back within one business day.
Four steps from first email to stationery in the supply closet.
Tell us the sizes, window or closed face, the letterhead stock, and the quantities. Itemized quotes usually come back within one business day.
Send a press-ready PDF in CMYK, images at 300 DPI, fonts embedded or outlined. Prepress checks bleed, margins, and the USPS clear zones, then you approve a digital proof.
Printed full color and checked against the approved proof. Standard jobs run 3 to 5 business days; specialty finishes run longer, and rush is available when the date is firm.
Boxed and shipped anywhere in the US, picked up in Lakeland, or held on our floor to feed the mail program the envelopes were spec'd for.
File setup, in one paragraph. Build the artwork at final size and export a press-ready PDF in CMYK, with images at 300 DPI and every font embedded or outlined. Mind the bleed and margin specifications so nothing important gets trimmed, and on envelopes respect the two zones USPS owns: the lower-right barcode clear zone, and the address area, which needs to stay readable, on a stock light enough to scan. Word documents and low-resolution images are the two file types that reliably delay an envelope job.
None of that is homework you have to pass alone. Every layout gets a prepress review before it runs, the digital proof shows exactly what will print, and if you want a machine's opinion first, the free file check tool reads DPI, bleed, color mode, and font embedding in about 30 seconds. No artwork at all? Our in-house design team builds envelope and letterhead art to print spec from your logo and brand colors.
On quantity: there is no hard minimum for most stationery orders, and short runs are practical because digital presses need no plate setup. Specialty treatments like thermography and foil stamping run on a longer schedule than plain ink, so flag them early if the date is tight. Reorders are the easy ones: the proven artwork is already on file, so the next box of envelopes is a confirmation, not a project.
Most of the envelopes we print do not sit in a closet; they feed statement runs, appeal packages, and renewal campaigns. So they get spec'd the way mail operations need them, from the first proof.
On a window envelope, every line of the address has to stay visible through the window in all orientations, even when the contents shift in transit. We position windows against your actual statement or letter layout, not a generic template, which is why window envelopes for invoices and patient statements are a specialty here rather than an afterthought.
The barcode clear zone stays open, the address area stays scannable, and the design avoids the classic failures: dark stocks scanners cannot read, gloss in the address area, sizes that fall outside the letter aspect ratio. The 24lb white wove default earns its place because it runs well through inserting equipment.
The classic appeal package is an outer #10, a letter, a reply card, and a #9 reply envelope nested inside, and the sizes have to nest cleanly or the package fights the inserter. We print outer and reply as a matched pair, which is exactly what nonprofit appeal programs and remittance billing live on.
For closed-face campaign mail, addresses and the Intelligent Mail barcode are inkjetted directly onto the envelope when the job mails, no labels. Your printed stock stays evergreen: the brand is on the envelope, and each campaign adds its own recipients when it runs.
The same logic carries into statement work. Patient statements travel with remittance slips, return envelopes, and billing inserts, which means the window position, the security tint, and the reply envelope all have to agree with the statement layout before the first piece prints. That combination is routine here because statement programs run inside the same building, under HIPAA-compliant controls, with the envelope spec proven against the document it will carry.
This page sells the printed stock. When you are ready to put it to work, the operations side lives next door: lettershop services handle the inserting, tabbing, addressing, and USPS entry, and mailing services carry a campaign from data file to postal drop. Because the stock and the operation share one roof, an envelope spec'd on this page never gets rejected by the team down the hall.
Six kinds of buyers we print envelopes and letterhead for, and what each one tends to spec.
Engraved-look thermography on conservative stocks, #10s matched to the letterhead, and 9x12s for documents that should arrive flat and serious.
Security tint #10 windows for statements and tax documents, remittance envelopes for payment returns, and letterhead that holds its color standard across offices.
Window envelopes positioned for patient statement layouts, return envelopes for payments, and security tints over protected information, produced inside a HIPAA-compliant facility.
Appeal packages built around the #9 reply envelope, A7 announcement envelopes that read personal rather than transactional, and letterhead for donor correspondence.
#10 window envelopes spec'd to the invoice layout, reply envelopes that bring payment back, and variable data when each envelope needs its own code or message.
Enrollment and policy packets in #10 and 6x9 formats, window envelopes for member documents, and branded stock that carries an agency through renewal season.
The common thread is repetition. Stationery is not a one-campaign purchase; it is the stock a business reaches for every working day. The buyers above order once, prove the spec, and then reorder on a rhythm, which is exactly the kind of program a single supplier with the proven artwork on file makes easy.
Both happen in this building; they are just different requests. Thirty seconds here saves a misdirected quote.
You want boxes of envelopes and letterhead: printed, finished, and delivered to your office or held for your next campaign. That is this page. Request the quote with sizes and quantities and we take it from there.
Stay here: Get an Envelope Quote →
You have a list and a date, and the envelopes need filling, addressing, and USPS entry. That is the lettershop's job: inserting, tabbing, addressing, presort, and induction, with the printed stock produced under the same roof.
Go to: Lettershop Services →
The eight questions the quote desk hears most, with the same answers we give on the phone.
Stationery rarely travels alone: cards for the handoff, brochures for the rack, and a mail operation to put the envelopes to work.
The third piece of the stationery system, from standard stocks to foil and raised print.
Folded marketing pieces that ride inside the envelopes this page prints.
Inserting, tabbing, addressing, and USPS entry for the envelopes you order here.
Data hygiene, presort, and postal entry for envelope campaigns at any volume.
The full service line behind this page, from booklets to flyers and beyond.
Where window envelopes, return envelopes, and statements meet compliance.
Since 1989. Veteran-owned. HIPAA-compliant and SOC 2 certified. Quote within one business day.
Tell us the sizes, window or closed face, the letterhead stock, and the quantities. No artwork yet? Mention design help with your quote request and the proof comes built to print spec.