Light and flyffy, normal size
The hat has a nice fluffy knit to it and a normal size contrary to what others state (8.5" - see attached photo).
Nice though the light knit is it makes the hat stretch quite a lot. So if you, like me, have a small head it won't sit firm when you cycle at full speed or something like that. By the way, the hat stretches more in width than length.
Bottom line: Nice style, 10 bucks, killer!