Step 1:
Fold in half

Step 6:
Fold over this line.

Step 5:
Fold over the prefolded lines.

Step 2:
Fold in half

Step 4:
Prefold over both lines, then unfold the fold of step 2

Step 3:
Prefold in half.

Step 10:
Fold over this line and insert a doll

Step 8:
Fold the edge to the left, then press the place indicated by the arrow flat again. The picture below shows the result.

Step 9:
Fold over these prefolded lines

Step 7:
Fold the edge upwards

Step 16:
The dress should look like this now.

Step 15:
Make the same folds on the backside.

Step 12:
Close the edges.

Step 11:
This is a Barbie doll of about 30 centimetres

Step 14:
Fold the corners inwards

Step 13:
Press the dress around the waist.

Step 18:
Tape / glue a newspaper strip around the waist, I used a dark part of a newspaper.

Step 17:
Press the dress inwards