From booklet:

Instructions are for size Small. Changes for Medium and Large are in parentheses.

MATERIALS - Sport Weight Yarn
SPINNERIN Sabrina (50-gr) 14(15-16) balls
OR Sport (2-oz) 11(12-13) balls
OR Elf (1-oz) 28(29-31) balls

NEEDLES: “Boye or Diana” No. 5 OR SIZE TO GIVE GAUGE

HOOK: Size F OR SIZE TO GIVE GAUGE

18-inch invisible neck zipper

GAUGE: St St 6 sts = 1 inch, 8 rows = 1 inch
Crochet Trim - Width 2 inches, 7 rows = 6 inches

FINISHED MEASUREMENTS (in inches) Bust 29.5(32-34.5)