Measurements
Average head size

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

Materials
POPPLETON DOUBLE DOUBLE KNITTING
Bijou Chunky 2 balls
Pica 2 balls
Dandy 3 balls

Materials for Complete Plain Set
POPPLETON DOUBLE DOUBLE KNITTING
Bijou Chunky 6 balls
Pica 7 balls
Dandy 9 balls.