Print-Ready Images for Amazon
Amazon has three distinct seller channels — Merch on Demand, KDP, and FBA — and each one has completely different image requirements. This guide covers the exact specifications, common rejection reasons, and how to prepare files that pass on the first upload.
Amazon is the largest single marketplace for print sellers, but it is actually three different platforms with three different file pipelines. A t-shirt design that works perfectly for Merch on Demand will be rejected by KDP. A product photo optimized for FBA will not work for Merch. Understanding which channel you are targeting — and what each one requires — is the difference between accepted uploads and days of frustrating rejections.
This guide covers every specification for all three Amazon channels: Merch on Demand (apparel and accessories), KDP (Kindle Direct Publishing for books and low-content), and FBA (Fulfilled by Amazon product images). Each section includes exact pixel dimensions, DPI requirements, file format rules, and the specific mistakes that trigger Amazon's automated rejection system.
File requirements
| Product Type | Dimensions (px) | DPI | Format | Max File Size |
|---|---|---|---|---|
| Merch — Standard T-Shirt | 4,500 x 5,400 | Not specified (PNG only) | PNG | 25 MB |
| Merch — Premium T-Shirt | 4,500 x 5,400 | Not specified | PNG | 25 MB |
| Merch — PopSocket | 1,876 x 1,876 | Not specified | PNG | 25 MB |
| Merch — Phone Case | 2,700 x 2,925 | Not specified | PNG | 25 MB |
| Merch — Tote Bag | 4,500 x 4,500 | Not specified | PNG | 25 MB |
| KDP — 6x9" Cover | 3,744 x 2,510 | 300 mandatory | PDF or TIFF | 650 MB |
| KDP — 8.5x11" Cover | 5,138 x 3,375 | 300 mandatory | PDF or TIFF | 650 MB |
| KDP — Interior Pages | Varies by trim | 300 mandatory | 650 MB | |
| FBA — Main Product Image | 2,000+ (long side) | 72 (web) | JPEG or PNG | 10 MB |
| FBA — Additional Images | 1,600+ (long side) | 72 (web) | JPEG or PNG | 10 MB |
Amazon requirements vary significantly by channel. Merch uses pixel dimensions with no DPI tag. KDP requires 300 DPI. FBA uses web-resolution images.
Three Amazon channels, three sets of rules
The most common mistake Amazon sellers make is assuming that "Amazon image requirements" is a single specification. It is not. Amazon operates three entirely separate upload systems, each with its own file processing pipeline, validation rules, and rejection criteria.
Merch on Demand is Amazon's print-on-demand service for apparel, phone cases, PopSockets, and tote bags. You upload a PNG design file that Amazon places onto a product template. Amazon handles printing, shipping, and customer service. Your file is a flat design — not a complete product mockup.
Kindle Direct Publishing (KDP) is Amazon's self-publishing platform for eBooks, paperbacks, hardcovers, and low-content books (journals, planners, coloring books). Cover files must be exact dimensions with bleed, at 300 DPI, in PDF or TIFF format. Interior pages also require 300 DPI PDF files with specific margin requirements.
Fulfilled by Amazon (FBA) is Amazon's marketplace for physical products. Product listing images are web-display images (not print files), but they have strict composition rules: pure white background (#FFFFFF), product filling 85% of the frame, no watermarks, no text overlays on the main image.
Different channels, different accounts
Merch on Demand requires a separate invitation-based account. KDP uses your standard Amazon account but has its own publishing dashboard. FBA uses your Amazon Seller Central account. You may need to manage three different dashboards to sell across all three channels.
Merch on Demand: template-based uploads
Amazon Merch on Demand uses a template system. You upload a flat PNG image at exact pixel dimensions, and Amazon's system composites it onto the product. Unlike Etsy digital downloads, you do not control the final print output — Amazon processes your file through their internal pipeline, which includes color conversion, resizing for different garment sizes, and placement on the product template.
This means your file must meet Amazon's exact specifications. There is no tolerance for incorrect dimensions — if your PNG is 4499 pixels wide instead of 4500, Amazon's system will reject it.
| Product | Width (px) | Height (px) | Aspect Ratio | Color Space |
|---|---|---|---|---|
| Standard T-Shirt | 4,500 | 5,400 | 5:6 | sRGB |
| Premium T-Shirt | 4,500 | 5,400 | 5:6 | sRGB |
| V-Neck T-Shirt | 4,500 | 5,400 | 5:6 | sRGB |
| Tank Top | 4,500 | 5,400 | 5:6 | sRGB |
| Sweatshirt | 4,500 | 5,400 | 5:6 | sRGB |
| Hoodie (pullover) | 4,500 | 5,400 | 5:6 | sRGB |
| PopSocket | 1,876 | 1,876 | 1:1 | sRGB |
| iPhone Case | 2,700 | 2,925 | 36:39 | sRGB |
| Tote Bag | 4,500 | 4,500 | 1:1 | sRGB |
| Throw Pillow | 4,500 | 4,500 | 1:1 | sRGB |
All Merch products require PNG format with transparent or opaque background. Maximum file size is 25 MB per upload.
Merch does NOT use DPI metadata
Unlike KDP and print shops, Amazon Merch ignores the DPI tag in your PNG file entirely. It uses raw pixel dimensions only. A 4500x5400 PNG at 72 DPI and a 4500x5400 PNG at 300 DPI are treated identically by the Merch system. The pixel count is what matters — not the DPI metadata. This confuses many sellers who come from a print background where DPI is critical.
Design placement tips for Merch:
- The design is centered on the garment. Amazon does not offer left-chest or back placement through the standard upload.
- For t-shirts, the visible print area on the final product is approximately 12 x 16 inches — not the full 15 x 18 inch canvas. Keep critical elements within the center 80% of the canvas.
- Transparent areas of the PNG become garment-colored on the final product. Use transparency strategically to let the garment color show through.
- Amazon downscales for smaller garment sizes (youth, women's fitted). Thin text and fine details under 2px wide may disappear on small sizes.
KDP: cover dimensions, bleed, and 300 DPI
Kindle Direct Publishing has the strictest image requirements of any Amazon channel. Cover files must be exactly the right dimensions (calculated from trim size, page count, and paper type), at exactly 300 DPI, with exactly 0.125 inches of bleed on all sides. KDP's automated validator rejects files that deviate from these specifications by even a single pixel.
Cover dimensions are not fixed — they depend on the book's trim size, page count, and paper stock. KDP provides a cover calculator tool that generates the exact pixel dimensions for your specific book. The formula for a paperback cover is:
Total width = Bleed + Back Cover + Spine + Front Cover + Bleed
Total height = Bleed + Trim Height + Bleed
Spine width = Page count x Paper thickness factor
| Trim Size | Front Cover (px) | Full Wrap @ 100pp (px) | Bleed | Common Use |
|---|---|---|---|---|
| 5 x 8" | 1,563 x 2,475 | 3,252 x 2,475 | 0.125" | Fiction, novellas |
| 5.5 x 8.5" | 1,713 x 2,625 | 3,552 x 2,625 | 0.125" | Trade paperback |
| 6 x 9" | 1,875 x 2,775 | 3,876 x 2,775 | 0.125" | Most popular — non-fiction, journals |
| 7 x 10" | 2,175 x 3,075 | 4,476 x 3,075 | 0.125" | Workbooks, textbooks |
| 8 x 10" | 2,475 x 3,075 | 5,076 x 3,075 | 0.125" | Activity books, coloring books |
| 8.5 x 11" | 2,625 x 3,375 | 5,376 x 3,375 | 0.125" | Planners, notebooks, journals |
Full wrap dimensions assume 100 pages on white paper (0.002252" per page). Actual spine width varies with page count and paper type. Always use KDP's cover calculator for exact dimensions.
KDP's cover calculator is the source of truth
Do not calculate cover dimensions manually. KDP provides a cover template generator at kdp.amazon.com/cover-calculator that outputs the exact pixel dimensions and a downloadable PNG template with marked zones for spine, front cover, back cover, bleed, and safe areas. Use it every time — spine width changes with every page count adjustment.
KDP interior page requirements:
- 300 DPI minimum for all images embedded in interior pages.
- PDF format — single PDF file containing all interior pages (not individual image files).
- CMYK color space preferred for color interiors. sRGB is accepted but may shift during Amazon's CMYK conversion.
- Margins: minimum 0.25 inches on all sides for pages without bleed. For full-bleed pages (images extending to the edge), add 0.125 inches of bleed on all sides.
- No crop marks or registration marks in the PDF — KDP adds its own during printing.
What Amazon does to your uploaded files
When you upload an image to any Amazon channel, Amazon does not simply display your file as-is. Each channel runs your file through an automated processing pipeline that validates, transforms, and sometimes modifies your image. Understanding what this pipeline does — and does not do — prevents surprises when your product goes live.
Merch on Demand processing
- Validates exact pixel dimensions (rejects non-matching files instantly).
- Checks for minimum color variation — designs that are nearly blank or a single solid color may be rejected as "low quality."
- Composites your PNG onto garment templates for the product listing preview.
- Downscales automatically for smaller garment sizes (XS, S, youth).
- Converts color profile to match the DTG printer's color gamut — what you see on screen may not exactly match the printed result.
KDP processing
- Validates dimensions to within 1 pixel of the required size.
- Checks DPI metadata — must be exactly 300 DPI (rejects 299 or 301).
- Validates bleed zones — content must extend fully into the bleed area.
- Runs automated content review for cover text, barcode placement, and ISBN.
- Converts RGB to CMYK for physical printing (sRGB colors may shift).
- Generates a 3D book preview from your cover file for the listing page.
FBA product image processing
- Validates minimum dimensions (1600px on the longest side for zoom eligibility, 2000+ recommended).
- Checks for pure white background (#FFFFFF) on the main image — off-white or light gray triggers a warning or rejection.
- Runs automated quality checks for text overlays, watermarks, and promotional badges on the main image (all prohibited).
- Generates thumbnail, detail, and zoom views at different resolutions from your original.
- Applies JPEG compression for web delivery — upload the highest quality original to preserve detail after compression.
Amazon compresses everything for the web
Regardless of channel, Amazon compresses all display images for web delivery. Your beautiful 20 MB PNG upload becomes a heavily compressed JPEG in the buyer's browser. This is why uploading at maximum quality matters — you need to provide enough source quality that the result looks good even after Amazon's compression. Start with the best file you can produce.
Why Amazon rejects files (and how to fix each)
Amazon's automated validation is unforgiving. A file that is technically correct but misses one obscure requirement will be rejected without a helpful error message. Here are the most common rejection reasons across all three channels, ranked by frequency.
1. Wrong pixel dimensions (Merch)
The most common Merch rejection. Your file must be exactly the required dimensions — not approximately, not "close enough." A file that is 4500 x 5399 will be rejected. A file that is 4501 x 5400 will be rejected.
Fix: Resize to exact pixels
Use a tool that resizes to exact pixel dimensions without rounding errors. Some design tools use anti-aliased resizing that can produce dimensions off by 1 pixel. Export at exactly 4500 x 5400 for t-shirts. If your source image is not a 5:6 ratio, crop first, then resize.
2. Incorrect DPI (KDP)
KDP requires exactly 300 DPI embedded in the file metadata. Many design tools default to 72 DPI (Photoshop, Figma, Canva). Even if your pixel dimensions are correct, a 72 DPI tag will trigger rejection.
Fix: Set DPI metadata to 300
In Photoshop: Image > Image Size > uncheck "Resample" > set Resolution to 300. This changes the metadata without altering pixels. In Ratio Ready: upload your image and select "300 DPI" — the DPI converter handles the metadata automatically.
3. Missing or incomplete bleed (KDP)
KDP covers require 0.125 inches of bleed on all sides. If your background color or image does not extend fully into the bleed area, leaving white edges or transparent areas in the bleed zone, the file is rejected.
Fix: Extend your design into the bleed zone
When designing your cover, extend background colors and images at least 0.125 inches beyond the trim line on all four sides. Do not place text or critical elements in this area — bleed content will be trimmed off during printing.
4. Non-white background (FBA main image)
Amazon requires the main product image to have a pure white background: RGB (255, 255, 255). Off-white, light gray, or cream backgrounds are detected and flagged. This applies only to the main image — secondary images can have any background.
Fix: Use automated background removal
Photograph your product on white, then use background removal tools to replace it with pure #FFFFFF white. Alternatively, photograph on any clean background and remove it entirely, then flatten onto white. Check the result by zooming in near product edges — shadows and reflections on gray backgrounds are the most common trigger.
5. Text or watermarks on main image (FBA)
Amazon's AI scanner detects text overlays, promotional badges, watermarks, and "sale" stickers on FBA main images. These are prohibited on the main (first) image but allowed on secondary images.
Exception: text on the actual product is allowed
Text that is physically part of the product (a brand name printed on the product, text on packaging) is allowed. The restriction applies to digitally added text overlays, badges, and watermarks. If Amazon's AI incorrectly flags your image, you can appeal with a clear photo showing the text is part of the physical product.
6. Low quality or insufficient detail (Merch)
Merch has an internal quality filter that rejects designs deemed too simple — a single line of text, a plain shape, or a design with very little color variation. While the exact threshold is undisclosed, designs with meaningful detail, multiple colors, and intentional composition pass consistently.
Preparing images for Amazon with Ratio Ready
Each Amazon channel requires different preparation. Here is the workflow for each, from source image to accepted upload.
Merch on Demand workflow
The process for Merch: create or source your design at minimum 4500 x 5400px for apparel, AI upscale if needed to 4500px+ width, set to PNG + sRGB with transparent background, validate exact pixel dimensions for target product, then upload to Merch to select product type, set price, and publish.
KDP cover workflow
The KDP process: get exact dimensions from KDP cover calculator for your trim size + page count, design at 300 DPI in the exact pixel dimensions from the calculator, include 0.125" bleed extending backgrounds beyond trim on all sides, export as PDF or TIFF with 300 DPI metadata and flattened layers, then upload and use KDP's 3D preview to verify spine alignment.
FBA product image workflow
The FBA process: photograph your product on a clean white or removable background with good lighting, remove background and replace with pure white (#FFFFFF), resize to 2000+ px on the long side for zoom eligibility, export JPEG at 95% quality for maximum quality to survive Amazon's re-compression, then upload to Seller Central with main image + up to 8 secondary images.
For Merch sellers specifically: If your source designs are AI-generated (1024-2048px from Midjourney, DALL-E, or Stable Diffusion), they need to be upscaled to 4500px width before uploading to Merch. Ratio Ready's AI upscaler can handle this in a single step — upload your 2048px design, select the 4500px+ target, and download the upscaled PNG ready for Merch upload.
Amazon pre-upload checklist
- Pixel dimensions match Amazon's exact requirements — no rounding, must be exactly right
- File format is correct for the channel (PNG for Merch, PDF/TIFF for KDP, JPEG for FBA)
- DPI metadata is 300 for KDP (ignored for Merch and FBA)
- Color space is sRGB (Merch, FBA) or CMYK (KDP preferred)
- Bleed extends 0.125 inches on all sides for KDP covers
- FBA main image has pure white (#FFFFFF) background
- No text overlays, watermarks, or badges on FBA main image
- File size is under the channel's maximum (25 MB Merch, 650 MB KDP, 10 MB FBA)
Dimension calculator
Common print sizes
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Print size (inches)
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Frequently asked questions
Related tools
Upscale AI-generated designs to Amazon Merch dimensions (4500px+) with ESRGAN and Bria AI models.
Set your image to exactly 300 DPI for KDP covers and interiors without changing pixel dimensions.
Batch process designs to exact pixel dimensions with transparent backgrounds for Merch on Demand.
Get your Amazon files accepted on the first upload
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