Gallery zoom and mobile search reward consistent squares and reasonable file sizes. Resize a batch of listing photos to one eBay-friendly frame, compress, then ZIP before you update live listings.
Follow the eBay catalog workflow (upload → resize → compress → checks → ZIP), then use eBay's listing uploader with the eBay Listing preset below.
In Bulk Resize, pick eBay Listing (1600×1600). More context: eBay image resizer.
Then run Bulk Compress. If uploads fail, read wrong listing image size and batch vs one-file compressors.
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