Collette Dinnigan - Brand new (never worn) Collette Dinnigan Silk Organza Strapless Gown from her current True Romance collection. I bought it in 2012 at the Collette Dinnigan boutique in Sydney and have never taken it out of the box (as packaged at the store).
It is an Australian size Small which is a US size 4. I am a true 4 and it fit me perfectly. All the size Smalls in this dress are sold out worldwide. Collette Dinnigan only produces a certain number of each design.