Hobbs Navy Vivien Satin Midi Dress, size 12. V-neck, ruffle sleeves, button front and peephole back. Brand new with tags, RRP £179.

From the Hobbs website:

Universally flattering, endlessly versatile. Vivien is the dress your wardrobe needs. Cut to a long midi length in a button-down fit and flare silhouette, it has feminine ruffle sleeves, a subtle split front and self-covered buttons. Dress it up with heels or wear it more casually with flat sandals. Crafted from satin back crepe for a flattering drape that feels wonderful against your skin

Approximate Measurements in inches:

Armpit to armpit: 19

Waist: 16

Length (shoulder to hem): 49