Today's standard Wal-Mart...make that "Walmart" (sans hyphen). Encompassing around 108,000 square feet, it sells only general merchandise.
Photo from Wikipedia / "Sven"


The Wal-Mart SuperCenter made its debut, in Washington, Missouri, in 1988. This format used to average around 197,000 square feet, but newer SuperCenters only encompass around 120,000. A full-line grocery section is included.
Photo from www.storetrax.com