Back to the 50s with Sika Designs

Okay, don’t beat me up that I am calling the new Labyrinth collection from the label Sika Designs “back to the 50s”. But doesn’t the hairdo and the dresses remind you of that decade a little, too?
Overall I like the collection: The colors are soft and the cuts are simple and elegant. What I adore mostly about Sika Designs is their great shopping portal that makes it very easy to actually purchase their designs. 
Which of the 4 designs do you like best?