Let’s be a mermaid under the sea, with starfish kisses, and secret shells to see. With frills and 3D wings to stand out in the sea. This is the Mermaid Vibe you will want to be. Socks Size 6-99 Years Old Socks Size Guide Socks can fit adults up to shoe size EU 40, the equivalent of a women's size 9 shoe. Washing Information Cold wash on delicate cycle or hand wash. Item/s to be only washed inside out or in a washing bag.