I need an evening gown for a black tie event. Size 18 prefer not to have my arms on show. I did have the black version of this which I loved, and if I find nothing better I will buy this in an appropriate size www.kiyonna.com/plus-size-clothing/Dresses/13130902 but I don't really know where to start, I was proper plus size before so have never had to do 'normal' posh dress shopping. Budget up to £200.
I only wear flats and am 5'10.