From the manufacturer

1) Wrap a tape measure snugly around your body and below your bust. After breathing out, take your measurement. If it's an even number that is your band size, but if it's an odd number, round up to the closest even number.

2) Wrap the tape measure around your chest at the fullest part of your breast. Subtract your band measurement from this number. If the difference is 1”, then you are an A cup; 2”, then you are a B cup; and so on, through DDD.

3) Combine your band measurement and your cup measurement to determine your correct size.

Product Description

Lilyette by Bali® Plunge Into Comfort keyhole minimizer underwire bra is a remarkable combination of fit, comfort, support, and cleavage. Part of The Lily Fit® System, the sexy plunge design provides a V-shape pitch that enhances cleavage and gently provides a sexy and secure fit! The more open underwire is engineered to reduce wire poke-through while offering natural support. The cups of this minimizer bra are unlined for lightweight comfort and are made of shimmering fabric that feels great against your skin. Pare down your profile in sublime comfort with this super-sexy women’s bra.