Materials
Using 20 g balls in 4 ply:
Dress: 3 (4, 4) balls for the main colour of the dress/pink and,
1 ball of contrast color/white.
Knickers: 2 balls of main colour.

Using 20 g balls in quickerknit:
Dress: 4 (4, 4) balls for the main colour of the dress/pink and,
1 ball of contrast color/white.
Knickers: 2 (3, 3) balls of main colour.