Bra Tips And Tests: The Underwire Test

Bra underwire test

Your breasts have a natural “crease line” where the underwire should fit comfortable against your ribcage (unless you have an unnatural breast crease). Please see “Additional Considerations” for additional discussion.

1. Put on your bra properly, then assess your underwires. 

• Underwire diameter is too small – The underarm end is poking breast tissue, or catches your arm as it moves forward. You need a larger cup size.
• Underwire diameter is too large – The underarm end is poking into your armpit. You need a smaller cup size or a bra with shorter underwires.

2. Assess your underwires in the middle of your chest 

• Underwires are tilting forward and away from your chest – This is usually a sign that you need a larger cup size. But, this could also be caused by having touching breasts or splayed breasts. For a more detailed discussion about this, please refer to the Breast Separation section on our website.

3. The underwires in the middle of your chest should be resting comfortably against your sternum. 

The one exception to this would be a minimizer style bra.

• Underwires are coming up too high in the center – If so, chances are you are short waisted or petite in height. You would be better served with a demi or balconnete bra style which tends to have shorter underwires. HerRoom also works very closely with all our vendors to identify bras that work on petite women with a plus-size figure. Please see our petite plus size bras section in HerRoom’s bra department.

The diameter of your underwire is too small if the underarm end is poking breast tissue, or catches your arm as it moves forward. The diameter of your underwire is too large if the underarm end is poking into your armpit. The best underwire for you is one that encircles your breast, giving you a more rounded and defined look. Women short in stature find that some underwires poke them under their arms because the wires are simply too tall for their body frame. One solution is to select demi cup bras – the wires are shorter and thus will not poke. 

The best underwire for you will be one that encircles your breast and gives you a more rounded and defined look. Women short in stature find that some underwires poke them under their arms because the wires are simply too tall for their body frame. One solution is to select demi cup bras – the wires are shorter and thus will not poke. Also, HerRoom identifies all bras with shorter underwires by grouping them in our petite plus size area in our bra department.

Check out HerRoom.com for more bra tips and tests.

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