St. Louis Cardinals Albert Pujols #68 2002 Donruss Elite
Default shipping for cards less than $20 ship will use the ebay 3 pouch trading card envelope per the link below. (The exception would be something like a graded card, or sealed slab that simply won't fit in an envelope). You also have the option to select USPS Ground Advantage for an additional cost which uses a rigid mailer, top loader, and added adequate protection similar to how all cards above $20 ship.
https://www.ebay.com/sellercenter/shipping/choosing-a-carrier-and-service/ebay-standard-envelope