Beautiful IRO Maxi Dress.
Size 38, which is equivalent of AU 10.
V Neck. 
The fabric is slightly sheer but with heavy embroidery on top (subtle and in black). 
Both the fabric and embroidery is cotton. 

Has tie sleeves (with an open feature).

It's a lovely resort / holiday type dress. 
I would throw on over slip or bathers, pair with strappy heels etc with a big sunhat.

Very good preloved condition. 
Gentle (even) wear on the fabric. 

Really well made dress from a quality designer brand.