Update Edit 7.19.23:That was the quickest size exchange I've ever experienced (helps they're in the same state as me). Two days only. Have the correct size now and quite honestly they're perfect. Light. Grippy. Comfortable. Fantastic ground-feel. Easy to adjust. Easy on/off. So light. So grippy. Just a fantastic sandal. 5-stars.(Sorry in advance for my ugly feet in the photos.)Original Review 7.17.23:I ordered the incorrect size and wound up with a sandal that was 1.5 to 2 sizes too small for my foot. Neverless they still (because they're sandals) just barely fit me with the tiniest over-hang of large toe at front, and heel right to the very edge at the back (I have very short toes). No, I didn't keep them, but am posting a review simply to state how fantastic they felt, even this small, right out of the box. Perfect stack height for grip AND flexibility. My main sandal for several years now are Bedrock sandals (which I adore). These are very similar but this particular model gives me the grip of those, plus the smaller stack height of even more minimal sandals.I bought a pair of these Oso Flaco Winged along with a pair of their model "Origen Flaco" (correctly sized) directly from Luna at the same time to try out. I am keeping the Origens (they have tired tread and leather upper) but like these lighter, grippier Oso Flacos so much I may reorder in the correct size and have both. Just two fantastic sandals right out of the gate. My wife has a couple pairs for two or three years now and loves them. I understand why.(And none of this is to say these are better than Bedrocks... I don't think they are, but they are every bit as good. I will say that I think Bedrocks likely win in the durability catagory by a bit, just judging from construction and design... but the margin is small. )Thanks Luna. From my feet on up, thanks!