“Instructions are given for (slippers) in bobble pattern. For plain stocking stitch garments follow instructions working k1 in place of each bobble stitch.”

Note that the given gauge is for 4mm needles - these slippers are made using solely 3.25mm needles.

Measurements
Foot Length
5, 6, 7, 7, 8, 9 cm
(2, 2½, 2¾, 2¾, 3, 3½ in)

Each source has its own set of recommended yarns. The following are taken from the Teddy version:

Materials
Teddy Baby Softspun DK or Teddy Family DK
1, 1, 1, 1, 1, 1 X 100 gram ball
Teddy Papoose DK
1, 1, 1, 1, 1, 1 X 100 gram balls
2 buttons.

One ball is sufficient to make both hat and slippers.