The clues for the Mystery Sock will be delivered to your
Ravelry library as follows:

22nd March
28th March
4th April
11th April

To fit foot circumference: 20.5 (23, 25.5, 28) cm 8 (9, 10, 11) in
Actual foot circumference of sock (unstretched): 18 (20, 22, 25) cm 7 (7, 8, 9) in