I absolutely love these sandals! They are extremely comfortable and required no break in period. I also tried the Universal Original, Sirra and Verra models, but found that their straps irritated my foot. That was not the case with the Tirra. I normally wear a 7 1/2 street size and ordered these in the black/gray size 8. I had tried on a size 7 1/2 prior to ordering and found that they fit a little too perfectly. The size 8 has just a tiny bit of space at the toes (great for avoiding toe stubs).