4 Megapixels is the minimum. Anything smaller than that is simply too low and cannot be accepted.
To maximise your chances of selling, make sure that you upload photos in the highest resolution you have available. These are more attractive to buyers who they can use them for a wider variety of purposes.
If you’re using the web uploader and upload a low resolution photo, an orange information icon will appear in the bottom right-hand corner.
The maximum size we currently accept is 45 megabytes.
For Insider Tips and Tricks on uploading higher resolution photos, check out our Magazine Article, Why You Should Upload Your Photos in the Largest Possible Size?