I bought this cap in large hoping it wouldn't be too tight and constricting and could cover my ears. It's perfect! I have a big head and tons of thick curly hair so it's tough to find caps that don't give me a head ache after 10 minutes of use. I probably could have even bough the normal size instead of large, but I am still happy with my purchase as it is so comfy and keeps me nice and warm.
I love this cap -it is solid for me from 35 degrees and up on calm/breezy days so far. The ear coverage is perfect and not too long.
Rode with this cap a few times now and overall its great. However, the fit is a little loose. I ended up going with a large and feel like its a little too big (yes I looked at the sizing chart). Wish it was a little tighter on my head.