These are Calvin Klein kids' sandals, purchased from a children's clothing select shop overseas. The color is navy. Regarding the size, the sticker indicating the size has peeled off, so I'm not sure of the exact size. I believe it's around 17 to 18 cm. I've taken photos with a measuring tape, so please refer to them before purchasing. These are used items, so please refrain from purchasing if you are sensitive to such things.