Which has smaller class sizes, Williams or Wellesley?

The main practical tradeoff is that both Williams and Wellesley are built around small, discussion-friendly classes, but Williams is usually perceived as a bit more consistently intimate in day-to-day academics. Williams has a smaller overall undergraduate population, and its tutorial system is especially known for creating very close faculty-student interaction. Wellesley also offers many small classes and strong access to professors, but its larger student body can make the experience feel slightly less uniformly tiny across the board.

At Williams, that reputation is tied not just to seminar-style courses but to tutorials, where students often work in pairs or very small groups with substantial faculty feedback. That model makes the classroom experience feel unusually direct and personal.

Wellesley still very much belongs in the small-class liberal arts category. Many classes, especially in the humanities and social sciences, are interactive and discussion-based, and faculty mentorship is a real strength there too. The difference is less about Wellesley being “big” and more about Williams feeling even more scaled for constant close contact.

So if the question is strictly which one has smaller class sizes overall, I would give the edge to Williams. If you are deciding based on whether professors will know you well, both can deliver that, but Williams is a little more likely to feel consistently tiny in practice.