Underwire bras come in all styles, fabrics, colours and sizes, they are designed to give extra support and shape.
As the name suggests any bra that has a wire running under each cup is classed as an underwired bra.
Under-wired bras are best for ladies B cup and above. Apple shaped figure and the hourglass will benefit from the support underwired bras give, but should not go for a padded or lightly padded underwire bra as they can make the breasts seem larger.
Hourglass women need support as they tend to have larger boobs, underwired bras are a great choice for hourglass figures, choose one with a plunging neckline for a sexy look.
Pear shapes figures and boyish figures may not need the benefit of the sturdy support from underwired bras but if you want to give them a go opt for ones that are more heavily padded to give you a fuller appearance up top.