Merch by Amazon merchandise graphic Creator and publisher

Selected applicants will design/create and publish/ upload design to Merch By Amazon account. Images, graphics, designs, and other contents must NOT be copyrighted and must design by the Applicant. What are five popular copyrighted Brands? What is the dimension for uploading a t-shirt design onto merch by Amazon? Other than T-Shirts what are three other items you can upload an image to on the merch by amazon site?