The phrase 'staggering estimate' is correct and usable in written English.
It can be used to describe an amount or estimate that is surprisingly large or high. For example, "The government released a staggering estimate of $50 trillion for how much the project would cost."
A staggering estimated one-third of gay youth attempt suicide.
Any decision about the levels of permissible exposure could force expensive soil cleanups — inflating the already staggering estimates of how much money it will take to rebuild from the natural disasters, a figure already set at $300 billion.
We have staggering estimates of the number of people harmed while undergoing medical treatment.
Given the absolutely staggering estimates of the expected number of climate refugees worldwide--from Bangladesh to the Maldives to our own backyards--these are the kinds of questions that we will need to be asking at a greater regularity, especially if real change and action do not occur.
Health care costs related to the treatment of diabetes and its complications are staggering, estimated at US$116 billion annually.
After some overnight calculations by city and state budget officials, they arrived at a staggering damage estimate from $34 billion up to $100 billion, depending on what insurance would cover.
The cost from both storms is still being calculated, but the state agency that regulates power providers offered a staggering preliminary estimate of the ice storm's havoc.
They argue that compensation should have been based on a staggering $27.3 billion estimate of damages by a court-appointed expert whom the judge chose to disregard.The dispute involves an arc of rainforest territory where oil has been pumped in large volumes since the 1970s.
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).
