What is the typical size for a Scrum Team?

The typical size for a Scrum Team is 10 or fewer people, including the Product Owner, the Scrum Master, and the Developers. The Scrum Guide states that "The Scrum Team is small enough to remain nimble and large enough to complete significant work within a Sprint. Fewer than three people decrease interaction and results in smaller productivity gains. Having more than ten people requires too much coordination. Large teams generate too much complexity for an empirical process to be useful."1 This means that the optimal Scrum Team size is between 3 and 10 people, depending on the context and the nature of the work.

References:

1: The Scrum Guide2, page 6

2: The Scrum Guide