Etsy's own recommended resolution for listing photos that stay sharp when zoomed.
Target: 2000×2000px
Etsy lets shoppers zoom into a listing photo, and any image uploaded smaller than the zoomed display size gets visibly pixelated the moment they do. Etsy's own guidance is 2000px on the shortest side — tall enough to stay sharp at full zoom, without being so large that it slows down the listing page.
This applies per photo, not just the primary listing image — every photo in the gallery benefits from the same treatment, since a shopper can zoom into any of them, not only the first one.
Every photo — Etsy applies the same zoom behaviour to every image in a listing gallery, not just the first one shoppers see.
Etsy displays listing thumbnails as a 4:3 or 1:1 crop depending on the shop's theme, but the underlying photo can be any ratio — a square crop (like 2000×2000) is the safest choice since it displays correctly in both layouts without an unexpected crop.
Don't upscale it — stretching a smaller photo up to 2000px doesn't add real detail and can look worse than uploading the original size. 2000px is a ceiling for photos that already have that much detail, not a target to force onto every image.