Taken from their "Extended License Handbook for Clients" page:
Items for Resale - Limited Run
You may purchase Extended Licenses allowing uses of the Content in items for resale, license, or other distribution, including:
- Up to 100,000 cards, stationery items, stickers, or paper products (50 credits).
- Up to 10,000 posters, calendars, mugs, or mousepads (50 credits).
- Up to 2,000 t-shirts, apparel items, games, toys, entertainment goods, or framed artwork (50 credits).