Is 0.160 square kilometers as big as Alcatraz?
It's about one-and-four-fifths times as big as Alcatraz

The size of Alcatraz is about 0.089 square kilometers.
(a.k.a. The Rock) (California)
Alcatraz Island measures 0.089 sq. km. It is known a part of the Golden Gate National Recreation Area, and has historically served as a lighthouse, fort, military prison, and — most famously — a federal prison.
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