Bra cup size is the measurement of full bust size so c cup is 3 inches bigger than band size. See this image for knowing band and bust size they are measured in inch suppose band size x inch bust size y inch then find difference between them ie x y then this difference represent cup size which will be denoted by combination of. Please note that this guide only gives you an estimate to your bra size as sizes may vary between different bra manufacturers. The grey cells in the table below demonstrate how the sizes diagonally adjacent from the top right to the bottom left are the same in breast volume ie. 0 aa 1 a 1 b 2 c 3 d 4 dd 5 ddde 6 f 7 g 8 h. You may refer to the chart below and use it as a guide to help you identify your appropriate sister sizes.
Cup size bust size band size. Find bras in all sizes here. Convert to international cup size. To calculate cup size deduct the band size from the bust size. The difference between your band size and size under your bust is a cup size. Egg cup tea cup coffee cup and challenge cup respectively.
So if the b. Bra sizes that are the same in volume are often referred to as sister sizes. In 1937 warners introduced its alphabet bra with four cup sizes a b c and d to its product descriptions. Two other companies model and fay miss renamed in 1935 as the bali brassiere company followed offering a b c and d cup sizes in the late 1930s. The same volume of breast tissue spread across different size rib cages band sizes. Before long these cup sizes got nicknames.
For example if your bra size is 34c you have the option to try either a size 32d or a size 36b.