Which school has smaller class sizes, UC Berkeley or Rice?

Rice is much more likely to give you the smaller-classroom experience. It is a far smaller undergraduate institution than UC Berkeley, and that shows up in day-to-day academics: more discussion-based classes, easier access to professors, and fewer giant lecture courses as a normal part of the first-year experience.

If you care most about regularly speaking up in class and building direct relationships with faculty, Rice fits that preference more naturally. Its residential college system also makes the campus feel more intimate, and many students describe professors as highly accessible both in and out of class.

UC Berkeley can absolutely offer excellent teaching and close faculty relationships, but you usually have to be more proactive about finding them. Berkeley has many smaller upper-division seminars and strong opportunities in office hours, research, and departmental communities, yet intro courses in popular subjects are often quite large.

That makes Berkeley a better match for a student who is comfortable navigating a big public university, using discussion sections and office hours strategically, and taking initiative to make a large campus feel smaller. In fields like engineering, computer science, economics, and biology, it is common to encounter substantial lecture classes early on.

Rice is the more consistent choice for a small-school style learning environment. Berkeley can deliver pockets of that experience, especially later in college or in certain majors, but Rice is the school where smaller class sizes are more built into the overall academic culture.