--- title: "Merch Design Checker: Merch by Amazon Image Size" description: "Check your PNG against Merch by Amazon image size and file rules: 4500 x 5400 px, PNG, under 25 MB, transparency and placement. Free, in your browser." url: https://podly.co/tools/merch-design-checker/ --- [Free tools](https://podly.co/tools/) [Design & print](https://podly.co/tools/#design-and-print) # Merch design checker for Merch by Amazon image size Check your file against the Merch by Amazon image size and file rules. Drop your PNG, pick the product, and see in seconds what passes, with a fix for every problem. - Free - No signup needed - Your file never leaves your browser Your design Drop your image here Choose a file PNG, up to 25 MB · Your file never leaves your browser Merch product Template: 4,500 × 5,400 px, PNG with transparency, sRGB, under 25 MB. Merch upload check – Drop your PNG to check it against Merch’s artwork rules. - Pixel size against the product’s template - PNG format, under 25 MB, RGB and sRGB - Transparent background, not fully empty - Semi-transparent pixels, edges and placement - How much of the canvas the design fills - Very light or very dark designs for shirt colors ## How the checker works The checker reads your file’s header in the browser (format, pixel size, color type, color profile), then samples its pixels to measure transparency, semi-transparent pixels, the box around your design, and how light or dark it is. Each line is compared with Merch on Demand’s own requirements for the product you picked. **Template match** your pixels = the product’s template pixels (4500 × 5400 for T-shirts) **Print width on a shirt** design width in px ÷ 300 = inches (3600 px = 12 in) **Canvas filled** box around the visible pixels ÷ canvas area The semi-transparency, edge and light-or-dark lines are common print-shop advice for direct-to-garment printing, not Amazon rules. Merch’s requirements were read on its resource pages on November 14, 2026. ![Podly Design templates: T-shirt designs from best-selling niches, sorted by style, interest, holiday and season](https://podly.co/images/home-v2/tab-design-1400.webp) Podly Design In Podly A clean file is step one. A design that sells is step two. Podly shows the sales rank, price and estimated sales of 50M+ Merch products, so you can see what sells before you design. [Start free](https://app.podly.co/register?utm_source=podly.co&utm_medium=website&utm_content=merch_design_checker) Free plan · No credit card ## How to use the Merch design checker 1. Export your design as a PNG from Photoshop, Illustrator, Affinity, Canva or Procreate. 2. Drop it on the box and pick the Merch product you will publish it on. T-shirts are selected by default. 3. Fix every pink line: Merch refuses or removes files that fail them. Then read the yellow warnings. 4. Check again until you see “Ready”, then upload it in the Merch create page. ## Merch by Amazon image size and file requirements Merch on Demand asks for artwork that is a **PNG with transparency**, in the **sRGB** color space, **smaller than 25 MB**, created at 100% of the print size at **300 DPI**, in RGB with 8 bits per channel. The uploader accepts files from 485 × 485 px. Template sizes as of November 2026: | Product | Pixels | | --- | --- | | T-shirts, tanks, raglans, long sleeves, sweatshirts | 4,500 × 5,400 | | Pullover and zip hoodies (back) | 4,500 × 5,400 | | Pullover and zip hoodies (front) | 4,500 × 4,050 | | Crop tops and crop sweatshirts | 4,500 × 4,050 | | Youth hoodies (front) | 3,330 × 2,997 | | Youth hoodies (back) | 3,450 × 4,140 | | PopSockets grips | 485 × 485 | | iPhone cases | 1,800 × 3,200 | | Tote bags and throw pillows | 2,925 × 2,925 | | Mugs | 2,700 × 1,050 | | Tumblers and water bottles | 3,000 × 1,400 | | Travel tumblers (40 oz) | 3,213 × 1,571 | | Printed baseball and trucker hats, sun visors | 1,500 × 675 | | Polos, quarter-zips, jackets, sport backpacks | 1,200 × 1,200 | | Crossbody bags | 1,200 × 750 | | Mousepads | 2,400 × 1,950 | | Hardcover journals | 1,050 × 1,950 | | Laptop sleeves (13") | 2,250 × 1,725 | | Laptop sleeves (15") | 4,650 × 3,600 | | Posters (8" × 10") | 2,100 × 2,700 | | Posters (16" × 20") | 4,200 × 5,400 | | Sherpa blankets (45" × 55") | 3,240 × 3,960 | | Throw blankets (45" × 55") | 13,500 × 16,500 | Sources: Merch on Demand’s [product templates](https://merch.amazon.com/resource/Y28FFE5NLRYJG4V), [design best practices](https://merch.amazon.com/resource/201849250), [FAQs](https://merch.amazon.com/resource/201846470) and the [guide to Merch product quality](https://merch.amazon.com/resource/6GWVH5S3QRFAJ59), all checked on November 14, 2026. Merch can change them; its create page has the final word. ## Worked example: a 4500 × 5400 T-shirt PNG A design on the T-shirt template that is 2,700 px wide prints 2,700 ÷ 300 = 9 inches wide, inside Merch’s advice to keep apparel designs at 12 inches or less. If the same artwork spans the full 4,500 px, it prints 15 inches wide, which Merch says customers often find overwhelming. If the design starts 1,800 px down the canvas, a third of the way, the checker suggests moving it up: Merch says apparel designs do best near the top of the print area. ## Mistakes that get Merch designs refused - **Saving as JPEG.** Merch only takes PNG, and JPEG has no transparency anyway. - **Leaving the background on.** A white or colored background prints as a rectangle. A single color over the whole print area is not allowed. - **Hidden or empty layers.** Fully transparent artwork is a quality issue Merch removes. - **Colors close to the shirt.** Dark gray on black or light designs on white barely show, and Merch lists that as disappointing content. - **Upscaling a small file.** It stays blurry. Check the real resolution with the [DPI checker](https://podly.co/tools/dpi-checker/). A clean file is only half of a listing. Podly’s [trademark check](https://podly.co/features/trademark-check/) catches protected phrases before you upload, and the [Merch royalty calculator](https://podly.co/royalties-calculator/) shows what you earn at each price. Facts checked and page updated on November 14, 2026. ## Merch design questions, answered. Something we missed? [Send us a message.](https://podly.co/contact/) A human answers. **01 What image size does Merch by Amazon need for a T-shirt?** A 4500 × 5400 px PNG, which is 15 × 18 inches at 300 DPI. The same size works for long sleeves, tank tops, sweatshirts, raglans and the back of hoodies. Hoodie fronts use 4500 × 4050 px. **02 What is the maximum file size for Merch on Demand?** Your PNG must be smaller than 25 MB. If it is bigger, save it again with stronger PNG compression (in Photoshop, "Smallest File Size") or remove hidden layers before you export. **03 Does Merch accept JPEG or a white background?** No JPEG: Merch only accepts PNG files. A white background is not refused by the uploader, but it prints as a white rectangle on the shirt, so export with a transparent background. **04 Can I upload a design smaller than 4500 × 5400 px?** Yes, Merch accepts artwork from 485 × 485 px and fits it to each product. But its editor cannot make artwork bigger than you uploaded it, so a small file prints small or soft. Start at the template size. **05 Is my design uploaded to Podly?** No. The checker reads your PNG inside your browser. Nothing is sent to Podly or anyone else. More free tools ## Keep going with these free tools. - Design & print ### DPI checker Check an image file’s DPI and print size - Design & print ### T-shirt design size chart Print sizes and placement by product - Design & print ### T-shirt mockup generator Preview your design on shirt colors Free ebook ## +1,000 Print-On-Demand niches. Free, in your inbox. More than 1,000 hot Print-On-Demand niches, updated weekly. Discover top-selling ideas and start getting more sales. [See what's in the guide](https://podly.co/1100-free-niche-for-merch-by-amazon/). ![The 1,000+ Niches That Sell ebook standing in the clouds](https://podly.co/images/home-v2/ebook.webp) ## Your file passes. Now pick a niche that sells. Join 6,000+ Merch sellers who check Podly before they design. [Start free, find best-sellers](https://app.podly.co/register?utm_source=podly.co&utm_medium=website&utm_content=merch_design_checker_final) [Add to Chrome, free](https://chromewebstore.google.com/detail/podly-ai-toolset-for-merc/dipicnapjjmogjmpcncbfooffdhcfndk) ![Podly Merch Database](https://podly.co/images/home-v2/tab-research.webp)