Really, to know if you bra fits, you should be checking more than just your cups and band but most of it can be fixed if you have those right .

Determine if the band fits

The band of your bra is responsible for holding most of the weight of your breasts.

1. It should be snug but not too tight. You should be able to accommodate one or two fingers under the band.

2. Check that the entire band is parallel to the floor. It should be at the same height on the front and on the back.

Signs that you're wearing the wrong band size

• If the bra rides up on the back, then it is too big and is not supporting your boobs properly, now the bra straps are and this is not what you want.
• Your breasts are popping out under the cups.
• The straps keep sliding off your shoulders.

It's a good idea to fit your new bras always on the loosest hook to give the bra band room to stretch out.

Determine if the cup fits

All these should be True:

1. The centerpiece of the cups should lay flat on your sternum.

2. Each of your breasts should be enclosed naturally inside each cup.

3. The underwires should not be poking into breast tissue on the outer sides.

4. Check that there is one continuous curve across the top of your breasts through the cup to the bottom of the underwire so not breast tissue is bulging out nor are the cups empty and wrinkled.