BaliWomen's Lace Desire All Over Wire Free Bra

I wear a size 34 c in most bras. the size chart says i need to order a small, but i usually order a medium. how true to size is the chart?

Will the xx-large fit bra size 44DD?

Does it give “uni-boob?” This is my problem with any bras that are wireless.

How are these bras sized