When Your Visuals Demand a Physical Canvas
You have spent weeks perfecting the artwork. Every color calibrated. Every pixel sharp. And then it hits you — this deserves to exist beyond the screen. Whether you are an independent artist shipping prints to collectors, a brand manager preparing a trade show booth, or a marketing director planning a direct mail campaign, the jump from digital file to printed piece is where things get real. That jump also happens to be where most people stumble.
At EcoPrinting, we have spent years helping creators, agencies, and businesses navigate custom poster printing and postcard printing from China — without the guesswork. This guide covers everything you actually need to know: sizes, paper stocks, print methods, finishes, MOQs, packaging, and what separates a forgettable print from one people keep on their wall (or their fridge).
Poster Sizes and Specifications
What are the standard poster sizes, and which one should you pick?
Posters do not have a single “standard” size — they have several, and the one you choose depends entirely on where the poster will live. In North America, the most common options are 24×36 inches (the classic movie poster), 18×24 inches (popular for art prints and event posters), and 11×17 inches (often used for indoor signage and smaller displays). In markets that follow ISO paper standards, A2 (420×594 mm, roughly 16.5×23.4 inches) and A1 (594×841 mm, roughly 23.4×33.1 inches) are the go-to formats.
Here is a practical rule of thumb. If the poster needs to be seen from across a room or a street — think retail window displays, trade show backdrops, or outdoor event boards — go with 24×36 or A1. If it is going on a gallery wall or a bedroom, 18×24 or A2 gives you presence without overwhelming the space. For handouts, flyer racks, or compact displays, 11×17 does the job without waste. The key is matching the size to the viewing distance and the environment. A beautifully printed 11×17 poster gets lost on a 10-foot wall, and a 24×36 poster looks aggressive in a small coffee shop corner.
Custom dimensions and bleed — things designers wish they knew earlier
Standard sizes are convenient, but custom dimensions are where custom poster printing really shines. At EcoPrinting, we can trim to virtually any size you specify. However, there is one non-negotiable rule: always include bleed. A 3 mm bleed on each edge (or 0.125 inches for US-sized files) ensures that when the sheet is trimmed, there are no thin white borders where the cut lands slightly off. Set your document size to the final trim size, then extend any background colors or images 3 mm beyond every edge. If you forget bleed, you risk a thin sliver of unprinted paper on one side — and that is the kind of thing you only notice after 500 copies arrive.
Paper and Print Methods
Coated, uncoated, gloss, matte — which paper stock works for posters?
Paper is not just a surface. It is half the personality of the final print. For posters, the most common stock is coated paper — available in gloss, matte, and silk (sometimes called satin) finishes. Gloss coated paper delivers punchy contrast and vivid saturation. It is the default choice for movie posters, promotional posters, and anything where color impact matters most. The tradeoff is glare — under bright lights or near windows, gloss can reflect enough to wash out detail.
Matte coated paper eliminates glare while maintaining excellent color reproduction. Many artists and photographers prefer matte because it feels more premium and the print remains readable from any angle. Silk sits somewhere between the two — it has a subtle sheen but none of the aggressive reflection of full gloss. For a completely different texture, uncoated paper offers a tactile, almost craft-like feel. Ink soaks into the surface rather than sitting on top, which softens colors but creates a warmth that coated stocks cannot replicate. Uncoated posters work beautifully for fine art reproductions and minimalist designs where the paper itself is part of the aesthetic.
For heavy-use posters — those destined for repeated handling, outdoor display, or long-term durability — consider cardstock in the 200–300 gsm range. It resists creasing and feels substantial in the hand, which matters when someone is paying $30 for an art print.
Offset vs. digital poster printing — when does each make sense?
This decision has real cost implications. Offset printing uses metal plates to transfer ink and produces exceptionally consistent color across an entire run. The upfront plate-making step means there is a setup cost, so offset becomes economical at higher quantities — generally 500 copies and above. Once the plates are made, the per-unit cost drops sharply, which is why offset is the standard for poster printing china bulk orders. The color accuracy and ink density are hard to beat, especially for large solid-color backgrounds or fine gradients.
Digital printing skips the plates entirely. The file goes directly to the press, which means faster turnaround, lower setup cost, and more flexibility for short runs. For orders of 50 to 300 posters, digital is almost always the smarter choice financially. The quality gap between digital and offset has narrowed significantly in recent years — modern digital presses handle photographic detail and vibrant color extremely well. The main limitation is that digital cannot print Pantone spot colors, so if your brand requires an exact PMS match, offset is your only option.
At EcoPrinting, we run both Heidelberg offset presses and high-end digital equipment. That means we can recommend the right method based on your actual quantity, not push you toward whatever machine happens to be idle. For smaller test batches, digital gives you a risk-free way to validate a design. For large-scale poster campaigns, offset delivers the lowest per-unit cost and the most consistent result across thousands of copies.
Finishes That Make a Difference
Lamination — gloss or matte?
Lamination applies a thin plastic film over the printed surface. It is the single most effective way to protect a poster from scuffs, moisture, and fading. Gloss lamination deepens colors and adds a polished, almost wet-look sheen. It works beautifully for retail posters, promotional displays, and anything displayed under artificial lighting. Matte lamination, by contrast, creates a soft, velvety surface that feels luxurious to the touch. It eliminates glare entirely and is the preferred choice for gallery-quality art prints and high-end event posters.
Both types add roughly the same amount of durability. The choice is aesthetic. If you want the poster to read as “commercial” — bright, eye-catching, and punchy — gloss lamination is the move. If you want it to read as “art” — understated, elegant, and tactile — matte lamination sets the right tone.
Spot UV and varnish for selective impact
Sometimes you do not want to coat the entire poster. Spot UV applies a high-gloss, raised coating to specific areas — think a logo, a title, or a key visual element — while leaving the rest of the poster matte. The contrast between the glossy spot and the matte background creates depth and draws attention exactly where you want it. Spot UV is especially effective on posters with dark backgrounds, where the gloss areas catch light and appear to float above the surface.
Varnish is a lighter alternative. Aqueous varnish provides a subtle protective layer without the thickness of lamination. It is available in gloss, matte, and satin finishes. Varnish costs less than lamination and is a good option when the poster does not need heavy-duty protection but could benefit from a refined finish.
Postcard Printing Essentials
Standard postcard sizes and USPS compatibility
Postcards live in a world governed by both design preference and postal regulations. The three most common sizes are 4×6 inches, 5×7 inches, and 6×9 inches. The 4×6 format is the workhorse of direct mail — it qualifies for USPS First-Class postcard rates (currently $0.65 per piece for single-piece mail in 2026), which makes it the most cost-effective option for bulk campaigns. To qualify as a postcard for USPS purposes, the piece must be rectangular, at least 3.5×5 inches, no larger than 4.25×6 inches, and printed on cardstock at least 0.007 inches thick. If any dimension exceeds 4.25×6, it mails at the letter rate instead, which is higher.
The 5×7 size gives you roughly 45% more surface area than 4×6 without a dramatic increase in postage (it falls under the letter rate). It is popular for save-the-dates, event invitations, and promotional postcards where you need room for both imagery and copy. The 6×9 format is essentially a small poster — it commands attention in the mailbox and works well for product launches, real estate marketing, and retail promotions. It mails at the letter rate, so factor that into your budget.
At EcoPrinting, we support all three standard sizes plus custom dimensions. For custom postcard printing , just send us your specs and we will confirm whether it fits within postal regulations for your target market.
Cardstock weight — 14pt vs. 16pt and premium options
Postcard stock is measured in points (pt), where each point represents 0.001 inches of thickness. The industry baseline is 14pt cardstock, which is roughly 0.014 inches thick — stiff enough to survive the postal system without bending, thin enough to keep postage costs reasonable. For a more premium feel, 16pt cardstock adds noticeable heft. It feels substantial when someone picks it up, and it holds up better during sorting and delivery. The difference in cost between 14pt and 16pt is typically modest on a per-unit basis, but at scale it adds up, so weigh the impression you want to make against your budget.
Beyond standard cardstock, we offer premium options including 18pt ultra-thick stock (feels almost like a rigid board), recycled cardstock with a natural kraft-like texture, and specialty stocks with metallic or pearlescent finishes. For luxury brands, a 16pt postcard with a soft-touch matte lamination communicates quality the moment someone touches it — before they have even read a word.
Double-sided printing — making the most of both sides
Almost every postcard we print is double-sided. The front carries the visual — photography, artwork, branding, the thing that makes someone stop and look. The back carries the message, the address block, and (optionally) a barcode or QR code. Printing on both sides essentially doubles your communication real estate for a marginal cost increase. On the back, you can include a personal note, a promotional offer, a map, or a tear-off coupon. The back should also leave room for the indicia (the printed postage mark) if you are mailing in bulk, and a clear return address block.
Design tip: if your postcard is going through the postal system, avoid placing critical design elements on the bottom 5/8 inch of the front side — that is where USPS applies its barcode during processing, and it can obscure your artwork.
MOQ, Pricing, and Logistics
MOQ comparison — posters vs. postcards
One of the biggest advantages of working with a poster printing china supplier like EcoPrinting is flexible minimum order quantities. For digital poster printing, our MOQ starts at just 50 copies — ideal for limited-edition art runs, test campaigns, or small businesses that do not want to commit to warehouse-level inventory. Offset poster printing has a higher MOQ, typically 500 copies, because the plate-making setup cost needs volume to justify itself.
Postcards follow a similar pattern but with higher minimums due to the trimming and finishing steps. Digital postcard printing starts at 100 pieces. Offset postcard printing becomes cost-effective at 1,000 pieces and above. These numbers are significantly lower than what many domestic printers offer, which is one reason brands and agencies increasingly source postcard printing from China.
Bulk pricing tiers — how the math works
Print pricing follows a steep curve. At 100 units, the fixed costs (file prep, press setup, plate making for offset) dominate the per-unit price. At 1,000 units, those costs are spread thin and the per-unit price drops by 40–60%. At 5,000 units, the price drops again — not as dramatically, but enough to matter. At 10,000 and above, the per-unit cost flattens out and you are essentially paying for paper, ink, labor, and shipping.
As a rough guide: a 4×6 postcard printed offset on 14pt cardstock with double-sided color and gloss lamination might cost $0.08–0.12 per piece at 5,000 units. That same postcard at 500 units might be $0.25–0.35 per piece in digital. A 24×36 poster on coated gloss stock with matte lamination might run $2.50–4.00 per piece at 500 units in offset, and $5.00–7.00 at 50 units in digital. These are estimates — every project gets a custom quote based on exact specifications — but they illustrate the volume-price relationship. The key takeaway: if you can plan ahead and order in bulk, the savings are substantial.
Packaging and shipping — tube vs. flat, shrink wrap vs. boxes
How your prints arrive matters as much as how they are made. Posters ship in sturdy kraft tubes — the industry standard for protecting large-format prints during transit. Each poster is rolled with a protective tissue interleaf to prevent scuffing, then inserted into a tube with end caps. For bulk poster orders, multiple copies are rolled together with tissue between each print, then tubed. Tubes withstand the rigors of international shipping far better than flat packaging for large formats.
Postcards ship differently. Small quantities are shrink-wrapped in bundles of 50 or 100, then packed in rigid cardboard mailers or small boxes. Bulk postcard orders are shrink-wrapped, stacked, and packed in corrugated cartons with edge protectors to prevent corner dings during transit. We use double-wall cartons for orders over 5,000 pieces — the extra rigidity is worth the slight cost increase because it nearly eliminates transit damage. Every shipment from EcoPrinting includes a packing list and tracking information, and we offer both air freight (5–7 business days) and sea freight (20–30 days) depending on your timeline and budget.
Proofing Before You Commit
Why a proof is non-negotiable — and what proof types we offer
We have all heard the horror stories. Five thousand postcards arrive with a typo in the phone number. Posters get delivered in a shade of blue that looked navy on screen but prints closer to periwinkle. These mistakes are avoidable, and a proof is how you avoid them. At EcoPrinting, we offer two proofing options.
The first is a digital PDF proof — fast, free, and included with every order. It shows layout, trim lines, bleed zones, and fold positions (for folded pieces). The PDF proof confirms that everything is in the right place, that no text is cut off, and that the file processed correctly on our end. What it cannot do is show you exact color, because every screen renders color differently.
The second option is a physical hard-copy proof — a single printed sample produced on the actual press (or a calibrated proofer) using your specified paper stock. A hard proof shows you real color, real texture, real density. It costs extra and adds 3–5 business days to the timeline, but for color-critical projects — brand campaigns, art prints, high-end postcards — it is the only way to sign off with complete confidence. We also offer paper sample kits — small swatch books of our available stocks — so you can feel the paper before committing to a full run. Request one when you reach out for a quote.
Real-World Applications
Art prints and event posters — when the print is the product
For independent artists, illustrators, and photographers, the poster is not a promotion — it is the product. Your customers frame it, gift it, and keep it for years. This context demands a different standard. Matte lamination or uncoated fine art paper stock creates the gallery feel collectors expect. Thicker stock (200–300 gsm) communicates substance. A signed and numbered limited edition printed on cheap paper feels like a contradiction — the materials need to match the creative intent. At EcoPrinting, we work with dozens of independent creators who sell prints online and at conventions, and the feedback we hear most often is that the paper quality directly affects repeat sales.
Event posters — for concerts, festivals, conferences, gallery openings — have a shorter lifespan but higher volume. Here, offset printing on gloss or silk coated stock at 150–200 gsm hits the sweet spot of impact and affordability. The posters need to look great on a cafe bulletin board for two weeks, not two decades. Plan for 18×24 or A2 as the default, with bleeds set properly and at least a matte varnish to prevent finger smudges during distribution.
Direct mail postcards and retail — when the postcard does the selling
Direct mail postcards are a performance marketing tool more than a printed product. The goal is immediate action — visit the website, use the coupon code, attend the open house. For direct mail campaigns, 4×6 and 6×9 are the dominant sizes. Include a clear single call to action, a trackable code or QR, and an offer with an expiration date. Urgency and clarity beat clever design every time. We have seen conversion rates triple just by increasing the font size of the offer and simplifying the layout.
Retail postcards serve a different purpose. These are the cards displayed at checkout counters, tucked into online order packages, or handed out at pop-up events. They function as miniature brand ambassadors — small enough to pocket, beautiful enough to keep. 5×7 or square formats on 16pt stock with a premium finish (soft-touch or spot UV) make a lasting impression. Include your Instagram handle, website, and a small incentive — 10% off next purchase, free shipping code — and you have given someone a reason to hold onto a piece of your brand.
