Face, Surface
The face radical and the face kanji are the same! But this isn't just a face like the one you're looking at your computer/phone with. It's the surface kind of face too!
The next time you look at your face, also notice how much surface area it has.
めん
おも, おもて
None
This face you're looking at, that has a lot of surface area, belongs to men (めん). Not a single man, but all men put together. It's hundreds of thousands of men's faces in a row.
Look at the face of all men put together. Measure how much surface area they all take up.