If you sell print-on-demand, your entire product catalogue probably exists as pixels before it exists as a physical item. You upload a design, the mockup generator wraps it around a t-shirt, and you have twelve listing images in about ninety seconds. It is the fastest catalogue-building method in e-commerce, and it is also the fastest way to get a listing suppressed if you get the rules wrong.
Marketplaces tightened up considerably through 2025 and into 2026, largely in response to a flood of AI-generated product images that showed items nobody was actually shipping. The rules now draw a sharp line between a mockup that accurately represents a real, orderable product and an image that simply looks like a product. This guide covers where that line sits on each platform, when a real photo beats a mockup, and how to prepare both so they upload cleanly everywhere.
What the marketplaces actually allow in 2026
The rules are not identical across platforms, and assuming they are is where most suspensions start.
Etsy
Etsy's baseline expectation is that you photograph the actual item a buyer receives. Print-on-demand is a recognised exception: mockups are permitted, and Etsy's guidance points sellers towards mockups supplied by their own print provider, because those reflect the real garment, real print area and real colours.
The rule that catches the most sellers is the filler-text rule. Your thumbnail cannot show placeholder text such as "Your Name Here" or "Custom Text". Personalised and made-to-order listings must display a finished, representative example instead. Etsy also tightened enforcement around fully AI-generated product imagery through 2025 and 2026, targeting listings where the image showed something the seller could not actually produce.
Amazon
Amazon is comparatively relaxed about how an image was produced and strict about what it depicts. The platform does not meaningfully distinguish between a photograph and a high-quality 3D render, provided the output meets spec and accurately represents the physical product. Background removal, colour correction, lighting adjustment and generated lifestyle scenes around a real product are all acceptable.
What is not acceptable: fabricating the product itself, or adding items that do not ship in the box. Generating a carry case around a pair of headphones sold without one is a listing suppression waiting to happen. The main image rules are unchanged — pure white background at RGB 255, 255, 255, product filling at least 85 per cent of the frame, and 1,600 px or more on the longest side so zoom activates.
Shopify and your own storefront
No approval queue, no policy team, and therefore no safety net. Your only constraints are consumer protection law and your return rate. Mockup-only galleries on a Shopify store convert perfectly well for apparel, but they leave you with no differentiation from every other store selling the same blank.
Where mockups genuinely win
Mockups are not a compromise. For a large part of a print-on-demand catalogue they are the correct choice.
- Catalogue scale. If you have 300 designs across five garment colours, photographing every combination is not a business decision, it is a hobby. Mockups make a large catalogue viable.
- Consistency. Every mockup uses identical lighting, crop and angle. That consistency is what makes a shop page look like a brand rather than a collection of unrelated uploads.
- Colour and placement accuracy. Provider mockups are generated from the actual blank, so the heather grey you see is the heather grey that ships.
- Testing before committing. You can list a design, measure demand, and only order a sample of the winners.
Where real photos are worth the effort
Buyers have become fluent in reading mockups. Many shoppers now actively skip listings that show only generator output, precisely because the marketplace is saturated with it. A single real photograph in the gallery signals that the product exists and that you have held one.
Prioritise real photography for: your best-selling designs, anything where texture matters (embroidery, puff print, heavyweight fleece), any product where fit is a purchase objection, and your shop's flagship listing. You do not need a real photo of every design. You need one on the listings that carry your revenue.
The hybrid gallery that works
- Image 1 (thumbnail): clean provider mockup, correct colour, no filler text. This is the one competing in search results.
- Image 2: real photo of the printed product, flat lay or on-model.
- Image 3: close-up detail shot of the actual print quality.
- Image 4: size or scale reference, ideally a real garment measurement graphic.
- Images 5 onwards: colour variants as mockups, care and sizing information as a graphic.
Specifications: what to export and where
Mockup generators output large files that are rarely sized for the destination. Printify accepts print files up to 100 MB for JPEG and PNG, which tells you nothing useful about what your listing image should be — those are input specs for the printer, not output specs for the marketplace.
| Platform | Recommended listing size | Aspect ratio | Format | Max file size |
|---|---|---|---|---|
| Etsy | 2000 x 2000 px (2000 px shortest side) | 1:1 or 4:3 | JPG, PNG, GIF | 10 MB |
| Amazon | 2000 x 2000 px (1600 px minimum for zoom) | 1:1 preferred | JPEG, PNG, TIFF, GIF | 10 MB |
| Shopify | 2048 x 2048 px | 1:1 | JPG, PNG, WebP | 20 MB (aim under 300 KB) |
| Shopee / Lazada | 1000 x 1000 px minimum | 1:1 | JPG, PNG | 2 MB / 5 MB |
| Carousell | 1080 x 1080 px | 1:1 | JPG, PNG | 10 MB |
Two practical notes. First, DPI is irrelevant for screen images — Etsy's 72 PPI recommendation is a metadata field, not a quality setting, and pixel dimensions are the only thing that affects how your image looks. Second, exporting one 2000 x 2000 px master per image and resizing down is far safer than exporting separately from the generator each time.
Getting one mockup set into five different marketplace sizes by hand is the tedious part. A batch tool such as PixelPrep takes a folder of generator exports and produces every marketplace size in one pass, so a new design collection is ready for all your channels in a couple of minutes rather than an evening.
The five mistakes that get print-on-demand listings pulled
- Filler text in the thumbnail. "Your Text Here" on a personalised mug is an Etsy policy breach, not a design choice. Show a finished example.
- Mockups for products you cannot produce. If your provider does not offer that colour or that placement, do not list the mockup for it.
- AI-generated products rather than AI-edited photos. Editing a real photo is fine everywhere. Generating a product that was never photographed is a suspension risk on both Etsy and Amazon.
- Watermarks, logos and promotional text on the main image. Amazon prohibits this outright on the main image, and it reads as low trust everywhere else.
- Lifestyle scenes with props that are not included. If the mug ships alone, the mockup showing a mug, coaster and gift box needs to be a secondary image with the contents stated clearly.
Reducing returns before they happen
Mockups create one predictable return driver: the buyer's mental image of scale and fabric weight is set by a rendered garment, not a real one. Two additions fix most of it. Add a print-dimension graphic showing the actual print size in centimetres against the garment, and add one honest photograph of the fabric texture in natural light. Both cost you a single listing slot and remove the two most common "not as expected" complaints.
Your print-on-demand image checklist
- Thumbnail is a provider mockup showing a finished product, no filler text, no watermark
- At least one real photograph of the printed item on every listing that sells
- Every mockup corresponds to a colour and placement you can actually order
- AI used only for editing real images, never for generating the product itself
- Master export at 2000 x 2000 px, resized per marketplace rather than re-exported
- Under 10 MB for Etsy and Amazon, under 2 MB for Shopee, under 300 KB for your own storefront
- sRGB colour profile, JPEG for photographic mockups, PNG only where transparency is needed
- Print-size graphic and a fabric or texture close-up included on apparel listings
- No props, packaging or accessories shown that do not ship with the order
The short version: mockups let you build a catalogue, real photos let you keep the customers it attracts. Use the generator for breadth, order samples of your winners, and photograph those. The listings carrying your revenue deserve evidence that the product exists.