Measurements
Width round head
41 and 46 cm (16 and 18 inch)

Each pamphlet has a different set of recommended yarns. The following are from the Argyll version.

Materials
(Total for helmet and ear muffs)
ARGYLL Machine Washable Double Knittings
Ferntex, Super Nylon, Nice ‘n’ Easy Crepe, NEW Sportsday, or Babytime
4, 5 balls.