> A single Boeing building in Everett, north of Seattle, is 4.3 million square feet. About half of Amazon's total.
You're talking about the Boeing Everett Factory[1], 399480 m2, 4.3 million square feet...
Of course it's big, it's a production line for Boeings 747-787, it's the largest building in the world by volume, you can see[2] that it can roughly fit 4 planes per line, with 6 lines, that's 24 planes
But... what does this have to do with office spaces in Seattle?