eBay Picture Services Supersize Pictures
Displays larger, more detailed pictures (up to 800w x 800h pixels--800 pixels on the longest side), optimised for fast download times, on your listing page
Enables buyers to preview your first picture in a separate Picture Viewer.
Restrictions and tips:
Pictures for Supersize must be at least 800 pixels on their longest side when uploaded — eBay recommends your pictures for Supersize are 1600 pixels or more on the longest side
Stretching your pictures with your own software before submitting for Supersize is not recommended
Only the Standard layout can be selected when using Supersize with Listing Designer.