I wouldn’t let the size of the department (either faculty or the number of majors per year) scare me off without more research.
I was a Classics major, and it is a particularly ripe field for inter-disciplinary work, visiting professors, etc. so the numbers don’t tell the entire story.
The professor who specialized in the art and architecture of the ancient world “belonged” to the Art History department (but was a very popular instructor for various Classics courses). The professor who specialized in the history of civic life and government (or something like that) was in the Poli Sci department but supervised undergrads and grads who were researching the origins of the city-state and civic life in ancient Rome and Athens. And at least half a dozen literature professors- comedy, tragedy, poetry-- who taught Classical literature, very popular classes-- but were affiliated with either the Comp Lit department or English.
There were visiting professors every semester-- experts in inscription and linguistics, archaeologists, even a professor of geology who was an expert in soil (he’d sponsor “stump the scholar” nights-- yes, he could tell the difference between Sicilian and Jerusalem dirt!)
So do not rule out a small department if the course offerings interest you… it could be “small but mighty” which is fantastic- close relationships with professors and other students, wide relationships across departments as well.