Gwlambo, can echo what you said, fist SK "The Original" I bought my regular size and was indeed too tight. They said to go up to the next size increment (~1/4" diff) and also, can untie the flaps to loosen a tad more. That worked pretty good for sizing. Their cotton canvas version was true to size. As for some mentioning thickness, you can get "The Original" or heavier weight wool, "The Mackinaw". Doesn't look like they're offering blaze orange in the "The Mackinaw" though.