A dress and boa for Barbie.

Pattern calls for generic 100% cotton 8/4 (fingering 4-ply) yarn for dress, and fur yarn for boa and skirt border.

Gauge is not given in the pattern, but you can find gauge for 8/4 cotton in the yarn section of the site.
With 2 mm needles: 32 sts and 44 rows = 10 cm x 10 cm
With 2½ mm needles: 28 sts and 39 rows = 10 cm x 10 cm