It's been estimated that 80% of women are wearing the wrong bra size. A lot of women are clinging to the idea of a specific size, forgetting that only the fit is what matters. However, all size is relative since it can vary greatly from brand to brand and from style to style. To know whether a bra fits or not, the following points should be considered:
The most important part of the bra is the back. This part should run horizontal around the chest and should not ride up your back. If it does, you should consider a smaller under-band size.
Is the neckline lying flat on the chest? If the neckline cuts into your breast then it is possible that the cup is too small. If it wrinkles, the cup is probably too big.
Is the bridge in the front between the cups lying flat on your sternum? If not, the cup is probably too small or the bra model is not right for you.
The underwire should frame the breast and lie flat on the chest. It should never pinch the breast tissue.
In the end it is important to examine the straps. They should be tight without cutting into the shoulder. If the straps leave pressure marks they should be elongated. Keep in mind: the support of the cups comes from the under band and the back part, not from the straps!
THE RIGHT WAY TO PUT ON A BRA
Putting on a bra seems rather intuitive. However, small things can greatly influence the comfort of a bra. The right way to put on a bra is especially important when assessing the fit of a bra. Therefore you should consider the following steps when putting on a bra at home or trying it on in a shop:
Place your arms through the straps and place the underbust band or the underwire beneath your breasts.
Bow slightly forward, let your breasts fall into the cup and close the back hooks. Another option is to put your bra around your waist, close it in the front and turn it carefully around your body until the cups are in the front. Then slide it upwards beneath the breasts. From the start the cups should point out, so that they do not have to be untucked or pulled back up.
If you put on the bra for the first time, use the set of hooks furthest out on the band. Later on, provided that it is comfortable, you can close the bra with the middle hooks. Make sure that the under band runs horizontal and does not slide up in the back.
Position the straps on the shoulders. If the bra is new it is possible that the straps will be too short. Therefore it is best if you lengthen them before putting the bra on for the first time.
Place a hand between cup and breast and gently push the breast from the side to the front into the cup. The breast tissue should completely lie in the cup and the underwire should frame the breasts. When wearing wireless bras the under band should sit tightly beneath the breasts without sliding up.
Lastly, it is important to examine the straps. They should be snug without cutting into the shoulder. If the straps leave pressure marks they should be lengthened. Keep in mind: the support of the cups comes from the underbust band and the back band, not from the straps!