From the Knit Rowan website:
Knit these accessory cosy felted slippers, available as a free pattern to download. Designed by Sarah Hatton using one of our most popular chunky yarns Rowan Big Wool (wool), this is the basic slipper pattern and can be customised to your hearts content. Why not try adding creative embroidery or crochet trims or even pom poms, buttons or bells, the opportunities are endless!!

Yarn information:
2 colour version
A – Smokey 007
1, 1 skein
87, 87 yards

B – Glum 056
2, 3 skeins
174, 261 yards

colour embroidered version
A – White Hot 001
3, 4 skeins
261, 348 yards

CC - Oddments of Kid Classic in Cherry Red 847 and Spruce 853

Extras:
leather/suede patches if required