Use inches as the unit of measurement.
To determine the band size, measure comfortably snug around the bra band. If the measurement falls exactly on a 1/2", use the smaller size range.
To determine the cup size, measure over the fullest part of the bust. If the measurement falls exactly on a 1/2", round measurement up to the nearest whole number.
Find the corresponding measurements on the Size Chart above. This will give you the correct Aviana bra size.
Note: The specific size designation varies on certain styles. (DD=E, DDD=F)