The Zendals spa sandals are a comfortable and beachy pair of slip-on thong sandals for women. They feature a geometric pattern and a V notch accent, with a gray synthetic upper and lining material. The outsole is also synthetic and non-slip, making them perfect for outdoor activities. These sandals are waterproof and vegan, with a low heel height and flat heel style. They are ideal for travel and casual occasions during the summer season. Being no size I can see I measured across toe area wide part 4.5"; arch area 3.5"; heel area 3.25"; sole length 10.50". I wear a 9/9.5 and they fit me, super comfy.