Invisible Bra, Fetoo Reusable Sticky Push Up Strapless Backless Silicone Adhesive Bra Reusable Soft Sticky Invisible Bra: The glue material is soft and there are no scratchy edges,it's very comfortable to wear it. Once you take the bra off you just put the plastic back over the glue to protect from dust, this will help keep, when you wear the bra again. Push Up Invisible Bra: Apply each cup separately then hook them together.You can pull your breasts together to achieve some really nice cleavage. Perfect for women who never stop pursuing fuller and charming breast. Strapless Backless Invisible Bra: There are no straps and the cups are unnoticeable under the garment, great for wedding dress, backless dress, low back dresses, deep V dress, evening gowns, low-cut outfits. Adhesive Invisible Bra: The adhesive on the back is great and sticks well when applied properly (i.e. Dry skin, no lotions, etc). You can gently wipe down the underside with water and that would help it stick better if necessary. Size Chart of Fetoo Invisible Bra : Cup A : 70A(32A) 75A(34A) 80A(36A) 85A(38A). Cup B : 70B(32B) 75B(34B) 80B(36B).Cup C : 85B(38B) 70C(32C) 75C(34C).Cup D: 80C(36C) 85C(38C) 70D(32D). Considering the shape of breast is varied,or if you are not sure about your size,we suggest you buying two adjacent sizes or a size bigger than before you wear.