Amazon, Etsy & Shopify product image size cheat sheet (2026) + a free in-browser checker

Ch Shu — Sun, 06 Sep 2026 01:18:32 +0000

I run a small AI product-photo tool for e-commerce sellers, and the same three questions come up every week: how big does my Amazon main image need to be, what does Etsy crop my thumbnail to, and why does Shopify reject my upload? The answers are spread across Seller Central, the Etsy Seller Handbook and the Shopify Help Center, so here is the condensed version I keep coming back to, plus a small checker I built that runs entirely in the browser.

Everything below is summarised from the marketplaces' published guidelines as of September 2026. Rules vary by category, so confirm in the official docs before you bet a listing on it.

Amazon

Rule	Value
Minimum size	1000 px on the longest side
Recommended	1600 px or more on the longest side (enables zoom); max 10,000 px
Background (main image)	Pure white, RGB 255,255,255. Off-white and gradients fail the automated check
Product in frame	85% or more of the image area, fully in frame, in focus
Not allowed on the main image	Text, logos, watermarks, borders, props, hands, multiple views
File	JPEG preferred; PNG, TIFF, non-animated GIF accepted; sRGB or CMYK

Only the main image has to be white. Images 2–7 can be lifestyle scenes, infographics, size charts.

Etsy

Rule	Value
Recommended size	2700 × 2025 px (4:3)
Minimum for zoom	Shortest side at least 2000 px
Thumbnail crop	4:3 in search results, 1:1 in some placements. Keep the product centred with room on every side
Photo count	Up to 20 photos and 2 videos per listing
File	JPG, PNG or GIF; sRGB

Etsy has no white-background rule. What bites people is the 4:3 crop: a tall, tightly framed photo loses its top and bottom in search.

Shopify

Rule	Value
Recommended size	2048 × 2048 px, square
Zoom threshold	Larger than 800 × 800 px
Upload limit	4472 × 4472 px (20 megapixels) or 20 MB
File	JPEG, PNG or WebP

The rule that actually affects conversion on Shopify is consistency: pick one aspect ratio for the whole catalog so collection grids line up.

The three mistakes I see most

"White" that isn't 255. A studio backdrop photographed under warm light comes out at 250/248/245. Looks white to you, fails Amazon's check.
Product too small in frame. Phone shots with lots of table around the product land at 50–60% fill. Amazon wants 85%.
Mixed ratios on Shopify. One square, one portrait, one 4:3, and the collection page looks broken.

The checker

I got tired of eyeballing this, so I wrote a page that does the checks client-side:

decodes the image on a Canvas, so nothing is uploaded anywhere and the file is gone when you close the tab
samples the outer 2% ring of pixels and counts how many have every channel at 250 or above; under ~98% white usually means an off-white or gradient backdrop
estimates product fill from the bounding box of pixels that differ from the backdrop colour, compared to the longest frame dimension (on a busy background it says "can't measure" instead of guessing)
checks dimensions and file size against all three platforms at once and prints pass / warn / fail per rule

It's free and needs no account: https://bestpng.com/tools/marketplace-image-checker