Since there is a lot of cross registration between Barnard and Columbia, the lectures vary in size, and tend to range from 40 students to 200 students. The smaller classes that I took were usually at Barnard, while the larger lectures were at Columbia. However there were also larger lectures at Barnard, which made the whole academic experience pretty diverse. I was definitely satisfied and enjoyed the freedom to take a variety of large and small classes, some small and intense, other larger and often less intense. The freedom to choose was key.