From the booklet:
One size fits all.

MATERIALS -- Sport Yarn Weight
SPINNERIN Sabrina (50-gr) 13 balls
OR Elf (1-oz) 26 balls

CROCHET HOOK “Boye or Diana” Size G OR SIZE TO GIVE GAUGE

GAUGE: 4 dc = 1 inch
2 mesh = 1 inch
5 rows = 2 inches

NOTE: Cover-up is worked from neck down in one piece. Hood is worked afterwards. For easier workability, block garment every 6 inches.