From the Knit Rowan website:
Knit these lovely stranded socks, part of the DC and Tutor competition designed by Frederica Patmore using the luxury Fine art a premium hand painted sock yarn (merino wool, kid mohair, mulberry silk and polyamide) and Pure Wool 4 ply (wool) this knitting pattern is for the experienced knitter.

Finished dimensions:
To fit UK shoe size 5-7

Yarn Information:
Fine Art
A - Pheasant 307
1 skein
437 yards

Pure Wool 4 ply
B - Porcelaine 451
1 skein
174 yards