eBay

I want to switch to new mode on the layout of my profile and such but I cannot find out how.

I accidentally switched back to old mode on my selling settings and such, and I don't like it at all. Can I switch back to the new mode?

I sold a large item that is 17 lbs and 11x14x23. When I enter these dimensions into "Custom Size" while printing my label thru eBay, I am given the option to ship as USPS Priority Mail Package. Can I still ship it as that even though I will have to p...