The most important types of bras differ primarily in the cut of the cups: triangle, plunge, balconette, bandeau, bralette, bustier, and molded bra. Whether a bra has an underwire is independent of this; almost every style also works without an underwire.

Your bra doesn't fit properly, even though you know your size? The cups are too small, the band too loose? Sister sizes could be the solution. Here's how to use them, with a chart and practical tips for the perfect fit.