RANDA clear strap sandals. The underside (sole) is quite dirty as shown in the image, but there is almost no noticeable dirt on the upper. The underside of the shoe is only marked with "M size," but since I can't enter "M size" on Mercari, I've entered 23cm. (I usually wear 23.5-24cm, but these feel small, so I listed them as 23cm.)