The resale apps say less about pixels than eBay or Amazon. Here’s everything their own help pages do say: photo counts, shape, and what buyers expect to see.
Read on each marketplace’s own help page on October 18, 2026. Marketplaces change their rules without telling anyone, so follow the link if it matters.
Poshmark
Shape
Square images are recommended (Poshmark’s Bulk Upload guide).
File types
JPEG, JPG and PNG are accepted for Bulk Upload.
How many
A Covershot plus up to 15 more images per listing in Bulk Upload. Poshmark suggests at least 4 images per item.
Covershot
Your main photo. Not a generic image, graphic or illustration, and no border or watermark.
Flaws
Include photos of any damage, excessive wear or stains.