Timeson Women's Casual Chiffon V Neck Cuffed Sleeve Blouse Tops

I'm 5'3" and about 145 lbs. what size should I buy?

This says xl is size 8 ... i think i should not buy although xl is what i usually order in shirts. i am 14-16

is the white a true bright white, or is it a cream/ivory? is it see-thru?

Every time i try to add to cart i get a red circle with a slas throuhg it why?