Headwear Wool 504 Flat Cap

Is the dark flannel color more like a charcoal gray? Charcoal gray is my favorite go-to fashion color. Thanks!

How do you clean it?

Have the sizes changed? years ago i got an xl. it fits a little tight. i bought an xxl from this listing recently. fits a little too big. help?.

My friend says that his hat size is 7 3/4. what is that a large or an x-large?