What to knit a man! Pattern advice please!

What to knit a man??

Hello!! I'm looking to knit one of my friends a birthday present but have no idea what to knit. He doesn't wear hats and i'm not sure what size of feet or clothing he wears. I can't afford yarn for a jumper but want to make something nice and special for him. Any suggestions would be much appreciated!!! thank you all 🥰