Student/faculty ratio is not a particularly good indicator of class size, because research/graduate focused schools (such as those in the Ivy League) reduce the teaching load so professors can spend more time doing research. Wesleyan has some grad programs and performs more research than the “typical” LAC, so it is toward the upper end of the range for LACs when it comes to the % of classes with more than 50 students.
School…S/F…%Classes…%Classes
…Ratio…>50…<20
Vassar…8:1…0.3%…67.2%
Wesleyan…8:1…3.0%…74.1%
Brown…7:1…10.7%…70.3%