"staggering size" is a correct and usable phrase in written English.
It can be used to describe something that is surprisingly large, overwhelming, or impressive in size. Example: The new shopping mall was of a staggering size, with multiple levels, hundreds of stores, and a massive food court.
Not surprisingly, staggering values for body mass also result in staggering size estimates for organs, e.g. a 200 kg heart for a 38 t Brachiosaurus (Gunga et al., 2008; Ganse et al., in press).
The department's staggering size & complexity - it is more than 35 times the size it was 20 yrs.
By what could have been the 18th hole, I was in peach overload and overwhelmed by the staggering size of the estate.
Despite the staggering size of Japan's debt-to-G.D.P. ratio, most of Japan's debt is held domestically, unlike that of Greece.
Because of the staggering size and importance of its pyramid, it has been suggested that Cholula was some kind of sister city to Teotihuacán.
The sculptor Phideas produced an astonishing stone frieze running for 547ft around the architrave of the building - an artistic achievement of staggering size and quality, a distillation of what the first Greek democracy could produce.
The company's staggering wealth and size made Mr. Vyakhirev one of Russia's most powerful men.
"The lake drainage event reported here was quite staggering in its size and the 3D image we got of the crater in the surface after the lake drained is unprecedented".
One of Britain's leading historians describes its size as "staggering".
That's a staggering proportion, given the size of its deployment: Hezbollah keeps about five thousand fighters in Syria, with another three thousand deployed as needed, according to Lebanese officials and sources close to Hezbollah.
That is a staggering 20 times the size of the nation's annual economic output, as Mr. Gensler describes it, aided by high-speed computerized trading and the actions of Mr. Gensler and his cohort in Washington.
