Generally speaking, people will consider "upper width and lower width"

The bottom is a little thinner, and you can wear loose ones on the top.

Something loose, such as a bat shirt.

Considering you are a student, in fact, sportswear can also be matched. The color doesn't matter, anything brighter will do.

If it's cold, you can also try a tight-necked sweater. Although the sweater is tight, it can be worn more in winter, and it can still create the effect of "wide on the top and narrow on the bottom".