The phrase "a sizable factor" is correct and usable in written English.
It can be used when discussing an important or significant element that contributes to a particular outcome or situation.
Example: "The increase in online sales was a sizable factor in the company's overall growth this year."
Alternatives: "a significant element" or "a considerable influence".
Maybe it's valid to query whether SAD is a stand-alone clinical disorder, but does that necessarily negate it as a sizable factor in making a depressed person feel even worse?
Some of his supporters are pushing the move as a way of ensuring a heavy black turn-out; others worry that Mr. Jackson remains a problematic figure among Jewish voters, who remain a sizable factor in Democratic primaries.
Police officials in Chicago say the increase in violence in their city is largely occurring in a handful of areas along the city's South and West sides, and they have repeatedly cited illegal guns as a sizable factor in the violence.
You're going to have to wait a bit longer to find out the really key detail however, as Oculus continues to micromanage the launch by withholding the price-tag — which will of course be a rather sizable factor in determining the size of the early adopter VR market.
There is a sizable industrial component.
The scree plot of the eigenvalues shows a sizable gap between the factors with relatively large eigenvalues (factor 1 3) and those with smaller eigenvalues (factor 4 14).
Among the significantly down-regulated genes, a sizable proportion encoded transcription factors, signaling proteins, and cell cycle associated proteins, largely inhibitors of cell cycle progression (Supplemental Table S1).
The GSA cited lower cost as the key factor, reflecting a sizable subsidy that Montgomery County taxpayers provided to keep the jobs.
But unlike some other drivers of store traffic, like eggs, pet food sales offer a sizable profit to retailers, a factor they are likely to consider when negotiating prices with major producers like Nestle.
RICHMOND — President Trump looms large over the race for Virginia governor, according to a new survey that finds the president is a factor for a sizable slice of the electorate.
Almost every country in the region has a sizable Chinese minority population -- another factor that has encouraged governments to befriend India as a counterbalance to Chinese influence.
