Naot sandals have great support for long days on your feet. These are only gently worn. I have found, in my advanced age, that I need a back strap to hold my foot. Slides just don’t make me feel secure. Hence, I’m selling many of my slides. They are a bright red, really pretty, as long as you like red! Heel is about 1-1/2 inch. Buckle is adjustable, 5 different holes (not Velcro). Size is European 40. I wear an 8-1/2 most of the time.