Each source has different recommended yarns. These are from the Patons UK version of the pattern.

Measurements
Chest sizes
50, 55, 60, 65, 70, 75 cm
(20, 22, 24, 26, 28, 30 in)
Finished measurement
61, 66, 72, 77, 82, 88 cm
(24½, 26½, 29, 31, 33, 35 in)
Length to shoulder
34, 39, 43, 47, 51, 56 cm
(13½, 15½, 17, 18½, 20, 22 in)
Sleeve length
22, 26, 30, 34, 38, 41 cm
(8½, 10, 12, 13½, 15, 16 in)

Materials
Patons Diploma Gold DK
4, 5, 6, 7, 8, 10 balls
6, 6, 7, 7, 7, 8 buttons.