This is Officially a  UK size 14 BUT  
 I would say a very small 14 in this case though more like a 12 
This is in the Ivory Over Sunkiss colourway a deep gorgeous taupe/ nude
which makes the Ivory/nude lace pop 
 
Fluttering sleeves sleek column lace Gown with deep V cross neckline
  and a triangle keyhole back plus she also has a split for the daring bride!
Just stunning and unusual like you !
Finished with a neat manageable puddle  train and zipper closure