Measurements
Small, Medium, Large
To fit those with chest
26-30, 32-36, 38-42 inches
(that is, age 7 to adult)

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

Materials
Argyll “Bulkee” Double Double Wool
3, 4, 4 2 oz. hanks
Argyll Double-Up
2, 3, 3 2 oz. balls
Crochet hook
Cable needle.