These are high-micron black thong sandals (setta). I've used them a few times, but there's no noticeable dirt on the surface. The soles show signs of wear (see photo 4). They look stylish if you wear them with your heel slightly overhanging, about 0.5mm to 1cm. Size: Approximately 23.5cm Heel height: Approximately 1cm #JapaneseAccessories #Setta (sandals)