This pattern originally called for Merlin, a discontinued Louet yarn of 60% linen and 40% wool.  It is now made with Euroflax Sport.

Yarn
Euroflax #2 Fine / Sport Weight 270 yd per 100g skein 

Yardage: XS - 4 skeins, S - 5 skeins, M - 6 skeins, L - 7 skeins, XL - 8 skeins

Hook
3mm

Notions 

36 (40, 44, 48, 52) beads large enough to pass your hook through

Gauge
24dc X 12 rows = 4 inches