Costco Wholesale Corporation operates an international chain of membership-only warehouses. The company has a total of 698 warehouses, with the average building approximately 144,000 square feet. It provides a wide selection of merchandise, ranging from alcoholic beverages and appliances to fresh food, pharmaceuticals, and tires. Costco is currently the largest membership-only warehouse club in the United States. The company’s worldwide headquarters are in Issaquah, Washington, USA.