If the lower peninsula is a mitten, what’s the U.P. shaped like?

I’m the only Michigander in my group of friends and they asked what we call the upper peninsula- and I couldn’t provide a good answer?

I remember being told it was a sock as a kid, but let’s be honest, thats fully not correct. So,, what is it??

Side note, my friends find it hilarious we call ourselves “Michiganders.” I think they’re jealous.