Not Vintage But Definitely Retro 60s Style Mod Dress. 
In very good used condition. 
Made by "Pop England Boutique"
Navy cotton shift dress , white polka dots. 
Fabulous white chiffon Jabot to chest front.
Pearlescent buttons. Fitted waistline. 
Small stand up collar. Rear zip fastening. 
Labelled as Size 3 ( Pop sizing as Large)
APPROX SIZE: UK 12
Measurements Laid Flat:
Pit to Pit: 19"
Bust: 18"
Waist: 16.5"
Hips: 18.5"
Length: 35"