How big is the team i work with?

Ashley, Depending on your role and what type of organization you work for, this would vary quite a bit.  In my career I have managed teams as small as 5 or 6 and upward of 30.  Although you may have oversight for a larger team, you will usually have direct involvement with a smaller number of people.  It's been my experience that it is optimal to keep the ratio to no more than 1:10, meaning you would directly manage up to 10 people and each of those may manage up to 10 people and so on.  Depending on what "Level" of management you may have a larger group that you oversee, but you may do that through other managers that report to you.

To add to Sally's answer, I take a broader view on leadership.

Management and Leadership Can Be Different

Keep in mind you can be a direct manager, responsible for employees with regards to performance and logistics (eg pay, career path, and so on). You can also be what is referred to as an individual contributor, and still lead people or entire teams. Think of the role of a project manager or product lead. In this case, on a high level, you collaborate with people across different teams, track milestones, and ensure everyone accomplishes what they are committed to.

Soft Skills

In both roles, you are responsible for performance insofar as achieving a specific end result. It's also important that you are strong in communication, adaptability, and intellect (seeing the big picture). Nothing is better than getting such experience first-hand. But you can also take classes on this if leadership is a challenge—it always is when dealing with people ;)

Respect The Field

The further you get into leadership roles, the further you also get from doing the actual work and execution. You really trust others to do the day-to-day, and they trust you to keep them on track, remove any blockers that may be in their way, keep them motivated, and so on. Sometimes, this may feel awkward.

When they say great leaders lead from the front, that means you are not above doing some of the day-to-day work yourself. And you truly respect and honor what your team does. That said, you must remain strategic and sometimes make snap-decisions to keep the project/program successful.

Why Believe Me

I was a direct manager of a team of 5 for seven years. I transitioned to an individual contributor postition where I project manage work in monthly cycles, working with 5-10 people per cycle, a role I've been in for nearly a year.