There are separate instructions for size 24 - 32 inch (child and teenager) and size 34 - 42 inch (adult).

Measurements
To fit chest
61, 66, 71, 76, 81, 86, 92, 97, 102, 107 cm
(24, 26, 28, 30, 32, 34, 36, 38, 40, 42 inch)
Length from back neck
38, 40, 46, 51, 56, 62, 65, 68, 70, 71 cm
(15, 16, 18, 20, 22, 24½, 25½, 26½, 27½, 28 inch)
Sleeve seam
24, 28, 31, 35, 40, 43, 43, 46, 46, 48 cm
(9½, 11, 12½, 14, 16, 17, 17, 18, 18, 19 inch)

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

Materials
STUDLEY DOUBLE KNITTING
Superwash (Machine Washable)
10, 11, 12, 13, 14, 15, 16, 17, 18, 19 balls
Tricel/Nylon Crepe
10, 11, 12, 13, 14, 15, 16, 17, 18, 19 balls
Studleyknit
9, 10, 11, 12, 12, 13, 14, 15, 16, 17 balls
Supreme
10, 11, 12, 13, 14, 15, 16, 17, 18, 19 balls
Chic
10, 11, 12, 13, 14, 15, 16, 17, 18, 19 balls
Minuet
10, 11, 12, 13, 14, 15, 16, 17, 18, 19 balls
Stitch holders.