The phrase "a sizable team" is correct and usable in written English.
It can be used to describe a team that is large in number or significant in size.
Example: "The project was a success due to the efforts of a sizable team working collaboratively."
Alternatives: "a large team" or "an extensive team".
While many haute French restaurants struggle to find servers who can talk about the menu nimbly and authoritatively, Anthos has fielded a sizable team of them.
With Bing's yearly revenue surpassing $3 billion, a 100-millisecond speedup is worth $18 million in annual incremental revenue enough to fund a sizable team.
Unlike other thermostat manufacturers, Nest Labs has a sizable team of specialists in the branch of artificial intelligence called machine learning, including Yoky Matsuoka, who came from Google and whose work won a MacArthur Foundation award.
Dinner etiquette: He reportedly had a sizable team of women make sure every single grain of rice that was served to him was identical in size, shape, and color.
At the Chicago headquarters, these efforts were guided by Messina and Jen O'Malley Dillon, the deputy campaign manager, along with a sizable team of political organizers and tech-savvy newcomers.
In 2010, with the help of a sizable team of scientists, specialized photographers and computer programmers, he built "14 Billions," supposedly the first three-dimensional model of a black widow spider's web — a greatly enlarged, walk-in version made with black elastic cord that was exhibited in Sweden and Britain.
Bryant's a pretty sizable team, probably the biggest team in the conference.
It has a sizable security team of top talent, infiltrates hacker rings to thwart their schemes, and offers cash bounties to white hats who identify bugs or holes.
The company most recently claimed to have over 200,000 drivers across some 25 cities in Indonesia, which remains the only market where it is active — although it does have a sizable development team located in India.
But "District 9" partly owes its special effects to the sizable team of Weta Digital.
As for what's next for the company, the plan is to add 100 people to its sizable team (now around 435 employees) during the course of 2013, including some expansion of its L.A.-based design team focused on ModCloth's private label.
