From the Knit Rowan website:
Big Wool Colour is a natural extension to the Big Wool family. This bright and fun yarn is easy to knit, knitting to the same tension as Big Wool makes this yarn ideal for adding colour to any Big Wool garment.

Details:
Article Number: 9802177
Fibre Content: Wool: 96%, Polyamide: 4%
Season: Autumn Winter
Yarn Ball Weight: 100g
Yarn Meterage/Yardage: 80/87
Tension/Gauge Stitches: 9
Tension/Gauge Rows: 12½

Recommended Knitting Needles:
Knitting Needle (UK): 000
Knitting Needle (US): 15
Knitting Needle, MM: 10