Just thought I would let other parents who endure sock traumas that Sainsburys (large stores) have some ladies (size 4 - 7) socks in black which are seamless. They are called ultimate comfort socks, short ankle length with cushioned foot and only a knitted foot shaping rather than a full seam. £4 for pack of 3, but 25% off at present. Ds who has just got into that size (I bought them for myself originally) likes them - and that is saying something. HTH