Rare early 1966 Biba baby blue linen mini dress.
Classic sleeveless design with racer back armholes, curved neckline, darted body with A-line cut. This predates the woven label so simply has a small size label in the neckline. 
This has a couple of marks in places ( see photos ) this is a linen so could be deep soaked or re-dyed blue again. This said it's still a rare early piece of Biba history which rarely come up. 
Perfect for any collocation or collector of rare fashion pieces. 
Measures when laid flat 
Armpit to armpit - 15"
Waist - 15"
Length - 32.5"