1. Ask someone to slide their hand between your back and the back of your bra.
2. Then have them turn their hand 90 degrees so that it is perpendicular to your back.Their hand should not be very firmly wedged...
3. ...and they should not be able to pull your bra further away from your back.
Elements of the Perfect Fit - Band
The back and front of your bra band should be level and parallel to the floor when you look at yourself
from the side in a mirror. If the band is too tight, digs into your flesh or is just plain uncomfortable,
it's too small. Signs that your band size is too big include breasts falling out from the bottom of your bra
and your bra back riding up. A correctly sized band will fit firmly around you and not ride up in the back.
The Band Test
Try this little test (see the sidebar).
A new bra should be able to pass this test with the clasp on the loosest fitting - this allows you to tighten
the bra as it stretches with wear and washing. Try to avoid buying a bra where the best fit is the bra's tightest
setting. My suggestion is to have a bra that fits on its loosest or at least its middle fastening position.
Elements of the Perfect Fit - Cup
Your bra cups should be large enough to prevent breast tissue from bulging or spilling out over the neckline or armhole edges. You'll know if your bra cups are too large if they have wrinkling,
or are clearly larger than both of your breasts.