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How To Measure Bra Size

If you want to double check your size, please email us.

There are 2 ways to find the right InvisiBra size for you. The quick route is to convert your UK bra size into InvisiBra size. The more accurate route is to measure yourself according to our measuring guide. Because InvisiBra is a backless bra, our sizes come in cup sizes only (A, B, C, D), without the band size (30, 32, 34) element. Please note that InvisiBra will fit cup sizes bigger than D. Do bear in mind that the further your cup size is from D, the less support InvisiBra will give. The best shape and support is achieved by a cup that covers about 75% of your breast area. If cups are too big for you, they will swamp your breast area and you’ll end up with pancakes instead of lifted rounded breasts!

The level of support achieved by InvisiBra depends on 2 things: getting the right size and how firm your breasts are. If you have lost a significant amount of elasticity and firmness, or you have heavy breasts, InvisiBra will give you only minimal support.


At least 80% of women are wearing the wrong size bra. This is because many do not know how to measure bra size. A bra in the wrong size is a big no no and can cause many problems. The wrong size for invisibra is problematic too, because if the size is too small, you won’t get enough coverage. Too big and the cups drown your breasts, giving little shape.

So how do we measure bra size?

All you need is a tape measure, a few minutes and 5 measurements. Put it into our bra size calculator to find out what your true bra size is. Measure yourself in front of a mirror or get a friend or partner to measure you. For the most accurate results, don’t wear a bra while measuring.

1. Under bust

Snug under bust: Measure your under bust (line 1). Hold the measuring tape parallel to the ground and exhale. The tape should be snug, tight enough that it doesn’t move, but not too tight that it digs into your skin.

Tight under bust (measurement 2): Measure again pulling the tape as tight as possible & exhale.

2. Standing bust

Measure around the fullest part of your breasts (line 2), make sure the tape goes over your nipples and is parallel to the ground.

3. Leading bust

Lean forward so that your upper body is parallel to the ground and your breasts are hanging. Measure around the body and the fullest part of your breasts. Keep the tape perpendicular to the ground.

4. Lying bust

Lie down on the ground and let your breasts fall naturally to the side. Measure around the body and the fullest part of your breasts, making sure that the tape is as straight as possible.

Please enter your measurements (in inches) to get estimated sizes.

Estimated Bra Size

Estimated UK Size

Please note that our sizing suggestion is advisory only. You should judge the appropriateness of size when you receive the product. Remember not to stick the bra on your skin until you are sure that the size you purchased is right for you as this will affect its eligibility for returns.




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