Hessmobile wrote a review of Patagonia Footwear Maui Air Shoe - Men's on April 25, 2014
Familiarity: I've put it through the wringer
Fit: Runs large
So normally I wear size 13 shoes. I got these in 13 and wore them for 2 years, and after finally becoming sick of putting up with how big these suckers are and flopping around like a big-foot doofus, I ordered a size 12 and they were STILL TOO BIG! I would suggest at least 1 1/2 sizes down from your regular shoe size.
I can't hate on these, I do like how light they are. They're the perfect backyard/indoor shoes. My Dad always comments on how cool they look. Good dad-shoe, I guess.