After sorting out I have a Miss Sixty Red Dress size XL but fits me perfectly and I'm a 10.
It has a strap at the back that fastens like a bra with three catches so I found I could fasten it in tighter on me.
It is two layers and a very floaty material, it has been worn once only and has been hanging in my wardrobe ever since.
Price includes delivery
PPG or BT