Sized a bit small, otherwise great
Just what I wanted in a helmet, meaning enough of a hemisphere-shaped accessory to convince my climbing buddies to let me on the rope.
My size Large weighs 10.6 oz, if anyone cares.
According to the sizing chart, the Large should fit 23in+. I have a 23inch dome, and am glad a got the large. It barely fits (at it's widest) over my skull and a light beanie. I cannot crank it all the way down over my bare head. So, I'm guessing if you are on the edge of a size, you should size up!