This outfit is awesome!!  It is 2-piece and features evening gown with high side slits.  The bodice is fitted as is the waist and the skirt is two panels with the slits as described.  Under it all, is are matching pants with elastic waist and palazzo style pant legs.  Beautiful jersey asian print.   Great vintage condition.

Measurements: Dress:  34"  bust; 26" waist; 36" hips (but have slits all the way up so there is a little extra here); 56" from shoulder to hem.  Pants:  24" elastic waist (but stretches 2 or so inches additional); 38" hips; 44" from waist to bottom of pants; 33" inseam.