Should I approach HR or talk to the person directly?

A coworker made a comment that I felt was body-shaming, and it made me uncomfortable.
I’m considering politely telling him directly that I found the comment inappropriate.
However, I’m already dealing with some emotional baggage, and I may have to work with this person again in the future.
I don’t want to create unnecessary tension or make things awkward between us.
At the same time, I’m unsure whether going to HR would be a better approach.

What would you do — talk to him privately or approach HR?