I’d like to add that it’s really hard to tell whether it’s fully erect or half-erect, so no, you’re not going to get a good indicator of his penis size from a blurry picture.

It’s also impossible to tell whether it’s really his dick or not (other than that it was posted on his Instagram for a few minutes before it was deleted), so unless you have a really huge Chris Evans obsession, I suggest you don’t waste your time entertaining your curiosity.