The main type of sellers of promotional items in the United States is called promotional product distributors. The Advertising Specialty Institute ranks the top promotional product distributors each year in its Counselor magazine; in 2014, Staples Promotional Products ranked first, Proforma ranked second and 4imprint ranked third.
As of November 2015, Staples Promotional Products sells many types of promo items in more than 15 categories on its website at StaplesPromotionalProducts.com, including Apparel, Business Supplies and Novelties. The site features an Ideas and Resources section to help buyers develop creative and effective promotional programs.
On its website at Proforma.com, Proforma bills itself as the leader in the printing, promotional products and packaging industries. It offers a wide range of promotional products, as well as related services such as ecommerce solutions and order fulfillment.
The Advertising Specialty Institute is an organization providing certification, promotion and education for promotional product distributors in the United States, as well as industry news, links to suppliers, and other information about the industry on its website at ASICentral.com. The website features a list of more than 50 categories of promotional product merchandise, from Apparel to Writing Instruments, with detailed information related to each category. The Promotional Products Association International is a similar organization, with a website at PPAI.org.