The average store size in the U.S. is the smallest it’s been in at least 17 years, reflecting profound changes in the way Americans now shop.

The rise in e-commerce and a growing distaste for giant emporiums are softening demand for department stores and other big-box space. Restaurants and coffee shops, meanwhile, are gobbling up small storefronts as Americans spend more time dining out, ordering at drive-throughs or using food-delivery apps.