Thanks for all your help! Umpqua Hunter, I see the sizing on he OR gaiters has some over lap between the size L and XL (10&11). I'm a 10.5 in shoe size so I need to decide on the size L or XL. By chance are you in that shoe range and if so what size did you order and how do they fit?
MY OR Crocodiles arrived today.
I wear a size 14 shoe and have VERY large calves, and so I went with the XXL. It is barely large enough through the calf. I haven't tried the fit with my boots yet.
From my reading, the most critical fit issue is the fit through the calf. My best "guess"...if you consider you have small/normal sized calves, go with the L and if larger calves go with the XL. I could not find any sizing charts based on calf size, only based on shoe size and the XXL was what was recommended for a 14 shoes size.
P.S. I was going to note from my research, some of the reviews I read said the Kuiu tended to run smaller in the calf. I have no experience with that, just noting what I read. Considering how the XXL barely fit me it was probably the right choice for me to go with the OR Crocodiles.