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Finding Your Sister Size

Please note sister sizing is only applicable for our tie-back swimwear or when sizing down in a clip back style. Sister sizing up a in a clip back is not suitable.

Did you know the majority of bra sizes have what is called a 'sister size'? This essentially means that there is the same volume of breast tissue in a cup, even when you have a different band (back) size (e.g your usual 10FF bra means you'll also fit an 8G or 12F).
This is also helpful if you are larger on the bottom half than the top half and want to buy a one piece. (e.g a 12E bust size and 14 brief would try a 14DD one piece).
Use the chart below to find out what your sister sizes are. All sizes on the same horizontal line are sister sizes. If you have a questions on sister sizing, please email info@marvell-lane.com

 

Band Size (8)

Band Size (10)

Band Size (12)

Band Size (14)

Band Size (16)

Cup Size

8DD

 *

 

 

 

Cup Size

8E

10DD

 *

 

 

Cup Size

8F

10E

12DD

 *

 

Cup Size

8FF

10F

12E

14DD

 *

Cup Size

8G

10FF

12F

14E

16DD

Cup Size

8GG

10G

12FF

14F

16E

Cup Size

8H

10GG

12G

14FF

16F

 Cup Size

 *

10H

12GG

14G

16FF

 Cup Size

 *

 *

12H

14GG

16G

 Cup Size

 *

 *

 *

14H

16GG

 Cup Size

 *

 *

 *

 *

16H

 * means that no smaller or larger Sister Size is available in our size range.