6 to 10 balls of main color, 1 ball contrast color

Extra long cuffs on sleeves, button and loop closure front.

From Patternworks.com:

Shaped Grey Cardigan
Extra-long cuffs and button-loop closures make this A-line shaped cardigan extraordinary.
• Sizes 36(40,44,49,57,65)“
• Yarn: Canadiana Heavy Worsted to Worsted weight 241 yard (100 gram) ball
#311 6 (6, 7, 8, 9, 10) balls
#312 1 ball
• Needles: I crochet hook