Yarn not specified; Materials state to use
“Knitting and Crochet cotton sufficiently thick to be worked with a steel crochet hook US size 1”. US size 1 is 2.25 mm hook according to some conversion charts.

Additional materials:
1/2 inch diameter buttons, six.
Shoulder pads
Steel crochet hooks size one and two.
Bust, 38” Shoulder width 15” Cardigan length, 20.25”, Sleeve length, 20.25”

Pattern “Elegance” is in the Fashion Crochet“ section of Magic Crochet.