If you sell fashion on multiple platforms, you already know the frustration: Amazon wants square images, Myntra wants portrait, Instagram wants something else entirely. And now that AI image generation tools let you choose between HD, 2K, and 4K output, there's an additional question — which resolution should you actually pick for each platform?
Getting this wrong costs you either way. Too low and your images get rejected or look blurry. Too high and you're paying for resolution nobody sees, slowing down your pages, and burning through your generation credits faster than necessary.
This guide breaks down the exact requirements for every major Indian marketplace and social platform, explains the practical differences between HD, 2K, and 4K, and gives you a clear recommendation for each channel.
Platform-by-Platform Requirements
Here are the current image specifications for every platform where Indian fashion sellers list their products:
| Platform | Minimum Size | Recommended Size | Aspect Ratio | Notes |
|---|---|---|---|---|
| Amazon India | 1000 x 1000 px | 2000 x 2000 px | 1:1 | Zoom requires 1600px+ on longest side |
| Flipkart | 1000 x 1000 px | 1500 x 1500 px | 1:1 | White background mandatory for main image |
| Myntra | 1080 x 1440 px | 1500 x 2000 px | 3:4 | Portrait orientation required |
| Ajio | 1080 x 1440 px | 1500 x 2000 px | 3:4 | Similar requirements to Myntra |
| Shopify / D2C | No strict minimum | 2048 x 2048 px | Flexible | Higher res = better zoom experience |
| Instagram Feed | 1080 x 1080 px | 1080 x 1350 px | 4:5 | Portrait crops perform best in feed |
| WhatsApp Catalog | No strict minimum | 1000 x 1000 px+ | 1:1 | No official spec but sharp images needed |
HD vs 2K vs 4K — What's the Practical Difference?
These terms get thrown around loosely. Here's exactly what they mean in the context of AI-generated product photography:
| Resolution | Dimensions (3:4) | Megapixels | Typical File Size | Best Use Case |
|---|---|---|---|---|
| HD | 1024 x 1536 px | 1.6 MP | 1 - 3 MB | Social media, WhatsApp, quick previews |
| 2K | 2048 x 3072 px | 6.3 MP | 4 - 8 MB | Marketplace listings, D2C sites, zoom-ready |
| 4K | 4096 x 6144 px | 25.2 MP | 10 - 25 MB | Premium lookbooks, print catalogs, hero banners |
The jump from HD to 2K is 4x the pixel count. The jump from 2K to 4K is another 4x. This matters because each step up means:
- More detail: Fabric textures, embroidery, and stitching are visibly sharper at 2K and above
- Better zoom: Customers can zoom further into the image without seeing blur or artifacts
- Larger file sizes: More pixels = bigger files, which affects page load speed and storage
- Higher generation cost: 2K and 4K images use more AI compute, which means more credits per image
The question isn't "which is the best" — it's "which is right for this specific use case."
Our Recommendation by Platform
Based on each platform's requirements, zoom behavior, and what actually impacts conversion rates, here is what we recommend:
| Platform | Recommended Resolution | Why |
|---|---|---|
| Amazon India | 2K (minimum) | Zoom feature requires high-res images. 2K at 2048px exceeds Amazon's 2000px recommendation and ensures crisp zoom-on-hover. |
| Flipkart | HD or 2K | Flipkart's recommended 1500px is comfortably above HD's 1024px short side. HD works, but 2K gives a quality edge. |
| Myntra | 2K | Myntra's audience is fashion-focused and detail-conscious. 2K portrait (2048x3072) nails their 3:4 ratio with plenty of detail for fabric close-ups. |
| Ajio | 2K | Same 3:4 portrait requirements as Myntra. 2K ensures you comfortably exceed their minimums. |
| Shopify / D2C | 2K or 4K | Your own site, your rules. 2K is the safe choice. 4K if you want maximum zoom detail or plan to use images in print. |
| Social Media | HD | Instagram and WhatsApp cap display at 1080px. HD resolution is more than enough. Faster to generate, smaller files. |
| Print Catalogs | 4K | Print requires 300 DPI. A 4K image (4096px wide) prints sharply at approximately 13.5 inches wide — perfect for catalog pages and lookbooks. |
Choose your resolution before generating. No resizing, no quality loss — native resolution output.
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File Size Considerations
Higher resolution images mean larger file sizes, and this matters more than most sellers realize:
- Marketplace upload limits: Amazon and Flipkart cap image uploads at 10 MB. Myntra and Ajio cap at 5 MB. A 4K PNG can easily exceed these limits.
- Page load speed: On your D2C Shopify store, oversized images slow down page loads. Every extra second of load time costs you 7-10% in conversion rate. This is especially critical for mobile shoppers on Indian 4G networks.
- Storage costs: If you manage thousands of SKUs with 5-8 images each, the difference between HD and 4K images is gigabytes of storage.
PNG vs JPEG — which format to use:
- PNG: Lossless quality, larger file size. Best for images with transparent backgrounds or when you need to preserve every pixel. CatalogX outputs PNG by default.
- JPEG at 85-90% quality: Virtually identical to PNG visually, but 3-5x smaller file size. Best for marketplace uploads and web display.
- JPEG below 80% quality: Artifacts become visible, especially on fabric textures and fine patterns. Avoid for fashion images.
How to Generate the Right Resolution on CatalogX
Choosing your output resolution on CatalogX is straightforward:
- Upload your product image to the CatalogX dashboard and choose your scene or background.
- Look for the resolution selector before generating. You will see options for HD (1024x1536), 2K (2048x3072), and 4K (4096x6144).
- Select the resolution that matches your target platform. Use the recommendation table above as a guide.
- Generate and download. The output image will be at your selected resolution natively — not upscaled from a lower resolution.
The key advantage of native resolution generation over upscaling is detail. A natively generated 2K image contains genuine detail in fabric textures, embroidery patterns, and garment edges. An upscaled HD image has the same pixel count but less actual detail — the AI is interpolating rather than generating.
If your plan only supports HD generation, CatalogX also offers a separate HD Upscale tool that uses AI to increase resolution. This produces better results than basic resizing, but native 2K or 4K generation will always be superior.
Frequently Asked Questions
Amazon India and Flipkart both allow product images up to 10 MB per file. However, most well-optimized product images fall between 200 KB and 2 MB. If your images exceed 10 MB, convert from PNG to JPEG at 85-90% quality to reduce file size without visible quality loss.
Yes, but use intelligent compression. JPEG at 85-90% quality is visually identical to 100% but can be 3-5x smaller in file size. Avoid compressing below 80% quality as artifacts become visible, especially on fabric textures and fine prints. CatalogX outputs PNG files which you can convert to JPEG using any image editor or online converter for smaller file sizes.
Amazon India, Flipkart, Myntra, and Ajio all have automated resolution checks and will reject images below their minimums. Amazon requires minimum 1000x1000px, Flipkart requires 1000x1000px, and Myntra and Ajio require 1080x1440px in a 3:4 ratio. Images below these thresholds are automatically blocked during the listing process.
Yes, generating natively at 2K resolution produces better results than generating at HD and then upscaling. Native 2K images have more genuine detail — sharper fabric textures, cleaner edges, and more accurate fine patterns. Upscaling adds resolution but cannot add detail that was never captured. If your plan supports 2K generation, always prefer native 2K over upscaled HD.
No Indian marketplace currently requires 4K images. Amazon's recommended maximum is 2000x2000px and Myntra's is around 1500x2000px. However, 4K images are valuable for D2C websites where you want maximum zoom detail, print catalogs, lookbook photography, and future-proofing your image library. If you sell on your own Shopify store alongside marketplaces, 4K gives you premium flexibility.