Vintage wedding dress yellowed dress size 6

80’s 90’s vintage wedding dress. Off white color. I took it out of the professional dry cleaner box. I don’t see spots or rips BUT there’s a yellow tone everywhere specially on the lower back of the dress due to age and storage improperly. Mannequin is size 8 and fits too tight. So I’ll says size 6. I don’t see labels or tags. I took measurements with a ruler ( check pictures) Thank you.