You will need two buttons for the booties. Rowan used # BN1785V/12 fro Bedecked in the UK.

Finished measurements:
Length of foot: 3.5(4.25, 5.5, 5, 5.5, 6, 6.75)“ 9(10.5, 11.5, 13, 14, 15, 16) cm

Yarn used:
Rowan Cashsoft Merino
Shade 102 Cream - 1(1, 1, 2, 2, 2, 3) balls