I have 5 dresses in this color, which is a pale white silvery color.  I have two in size 4, two in size 8 and one in size 12 plus a blue maid of honor dress (same style) but in blue, size 8.

These are from the Dessy collection and have never been worn and are unaltered.  They include detacheable spaghetti straps and a removeable ruffle belt.  They are floor length.