Good article, NE. It's hard to believe that the Sears store was 816,000 SF (and was the largest Sears store in the world). Bloomingdale's on Lexington is 859,000, Sak's Fifth Avenue is 646,000 SF and Lord & Taylor is 611,000 SF. On the other hand Macy's on West 34th is 2.2 million SF.
Nordstrom's flagship store is Seattle is 383,000 SF.
Neiman-Marcus's flagship store in Dallas is 129,000 SF.
Harrod's is the largest department store in Europe with about 1,000,000 SF, and Selfridge's has 540,000 SF.
Le Bon Marche in Paris is 344,000 SF.
KaDeWe in Berlin is about 645,000 SF, continental Europe's biggest AFAIK.