I have been wearing Fitflop since they came out.  The one thing you should know is that they always run big. I take a 71/2M in boots, sneaks. In clogs and open toe shoes or sandals I wear a 6M. I ordered a size 5M in this clog and it fits perfect with no socks. I also ordered a 6M in this clog so I could wear socks and the fit is perfect. I order a size 5M in Fitflop sandals. Hope I didn't confuse you. Just remember that they run big.  They are very comfortable with just the right amount of shearling. There is no shearling on the foot bed just on the top of your foot.