Measurements
To fit chest
61, 66, 71, 76 cm
24, 26, 28, 30 ins
Length from back neck
41, 44, 47, 53 cm
16, 17½, 18½, 21 ins
Sleeve seam
27, 29, 32, 36 cm
10½, 11½, 12½, 14 ins

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

Materials
STUDLEY Double Double Knitting
Supreme, Scandi, or Studleyknit Double Double
Main 8, 9, 10, 11 balls
Contrast 4, 4, 5, 5 balls
One 35, 35, 41, 46 cm (14, 14, 16, 18 inches) open end zip fastener.