Pop's Sweater and matching hat

So, I finished my dad's sweater a couple of weeks ago and I had yarn left, so I made my first knitted hat. I didn't actually have a specific pattern. I wanted to rib the bottom like the sweater and just do stockinette stitch for the rest of it. A friend told me how many to cast on and i went form there. Of course, I've told my dad that he REALLY doesn't have to wear the hat with the sweater. In fact I actually prefer him not to. He says his girlfriend will probably steal the hat anyway so then they'll just match. :D but here's the hat and sweater.