I have added a reference photo from the 1977 fall runway that has the same feel with the silk chiffon and oversized print. The Rive gauche collection often pulled elements from the couture collection the season before so it would make perfect sense that this was a version from the next collection in the Spring of 1978. 

This is a very romantic feeling and special dress from Yves Saint Laurent that is incredibly beautiful. It really illustrates his genius in working with fine silks and chiffon. It is made from a custom screened large floral print silk chiffon and everything about it is spectacular. The bodice has short wide cut sleeves that have a cuffed detailing to them. The neckline is kept simple and plunges down quite deep to the waist where it is caught up with a row of silk covered buttons. The waist is cinched in with a banding of the same fabric and there is a matching tie belt that cinches in the waist more. The skirt flows to the ground in a beautiful cascade of silk and it is cut loose and easy so it very easy to wear. The dress is unlined so it has a touch of transparency to it that contrasts with the very innocent and romantic floral print. The fabric is a very fine silk chiffon and the print mixes that beautiful coral and white wonderfully. It has a very romantic and pretty and yet is sophisticated and refined at the same time - classic YSL genius! I love it. Excellent condition with a couple of minor notes below.

Unlined and buttons at the front. Has its matching silk tie belt. Tagged a 36. There are a couple of very minor marks on the silk, a couple of teeny pinholes near the shoulder and the buttons show minor stress at their edge. Please review the photos following the label shot. Note this is shown on a size 2 dress form and will fit a narrow rib/small bust size 4 as well.

Shoulders: no defines seams
Bust: to 16.5" flat across from side seam to side seam
High waist: 13.5" flat across from side seam to side seam
Hips: open
Bodice: 14" from neck to waist
Skirt: 42" from waist to hem

Modern Sizing Equivalent: XXS-XS

Item# DD3463

Reference Photo: Yves Saint Laurent Fall 1977 Haute Couture Collection.

This garment has been professionally cleaned, pressed and is odor free. Thoroughly checked over before shipping, it will be ready to wear upon arrival.