They work for sizes A,B, C and D. It has where the edges can be trimmed according to size. If she wears a D, she just won't need to trim any, it has dotted lines to trim accordingly for smaller sizes. These are great for wearing tank tops and strapless.
yeah, they are gr8 to have. I wear them sometimes with my strapless shirts. It just keeps the breasts lifted. However it does not offer nipple coverage.
Im not really sure how long they would stay on, if you don't remove them. I usually would wear them to go out for a night of clubbing. I have woke up the next day and still have them on til about dinner. They stick pretty good. There are 10 in a pack so 5 sets, and most likely made for one time wear.
For anyone wondering how to apply these, there are instructional videos online. When I got these I just typed in How to use BareLifts and all kinds of videos were available. On their commercial they claim these are good for 24 hours and waterproof.