These are UGG knit boots. They are authentic, purchased from an authorized retailer. Please rest assured. Size: 21cm. Suitable for women with small feet or children. Color: Gray Worn about twice. The soles are clean, with almost no stains. I can't take a picture of the inside, but there is wool lining on the inner sole. (Like regular UGGs) I can add more photos. Color: Gray Stains, tears, or odors: None