It is very important to remember the band around your body should provide nearly all the support and needs to fit snugly, but comfortably. However, you should still be able to slide your finger under the band. The band of your bra should be positioned in the middle of your back, creating ahorizontal line and it should not rise up!

If it is riding up, it is too loose and you need to decrease your band size. Remember, you may need to adjust your cup size. By changing your band size, it is more than likely your cup size will have changed.

General rule is if you decrease band size and your cup was fitting properly before,
then you should increase your cup size.

For example: A previous 38B now dropped two band sizes; so goes up two cup sizes to a 34D.

Your new bra should be comfortably fastened on the last or second to last eye, allowing you to adjust the fit as needed. With wash and wear your back band may stretch. Moving to the inner hooks will continue to give you the support you need.

Your breasts should still be fitted comfortably and enclosed in the cups of your bra. There should be a smooth line where the top the cup meets your breast. The wires in the front should lie flat against your breastbone and under your breasts.

When your back band is fitting correctly and your breasts are comfortably supported by the right size cup; congratulations you are wearing the right size!