- Size: One size • Invisible socks that cover only the toes or a little more, perfectly hiding in backless shoes, adding elegance to your outfit. • Non-slip silicone dots on the bottom of the socks to enhance grip and minimize slipping. • Ultra-thin and breathable fabric that keeps feet comfortable, cool, and dry, preventing odor. • Elastic socks that fit perfectly to the skin for a comfortable wearing experience. • Perfect for flats, backless shoes, high heels, clogs, dress shoes, mules, etc. • Fits U.S. women's shoe sizes 5-8.5.