I love to walk, but sometimes, even if it’s not particularly cold out, my ears will start to hurt from the chill.
I’ll often wear a hoodie to help with this (especially if it’s a little breezy), and sometimes I’ll press my palm against my ear to help with the problem, but neither is a great solution.
These are perfect: they fit in my coat pockets as a just-in-case item, they don’t reduce my hearing, and, unlike a hat, they don’t make me too warm and they don’t give me hat-hair.
There’s a sizing guide in the product photos on Amazon, but basically I think the mediums are good for women (I’m at the very low-end) and for men with relatively dainty ears, and otherwise I’d size up.