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Start by understanding how bra sizing works and what the right fit should look and feel like. Our guide gives you the tools you need to fit yourself. It’s easier than you think. If you need a little more assistance please book a free virtual fit consultation.
Many factors can affect your bra size such as pregnancy, hormones, weight fluctuations, exercise, etc. It’s important to re-evaluate your bra fit once a year.
Does your bra fit properly? Try it on and examine these three key points to tell you.
Now that you’ve assessed the fit, here are some solutions to common bra fit problems.
A summary of size conversions for bras, bodysuits, slips and knickers.
Bra sizes are made up of a number and a letter. The number represents your back size and the letter represents cup volume.
The letter (cup) does not represent one single size (i.e. not all B cups are the same size). The letter represents a difference (in inches) between the back and bust measurement.
One inch difference is an A, the second is a B, the third a C, the fourth a D, and so on.
Each column in our size chart below represents bras with the same cup size, but different back sizes. For example, 36A, 34B, 32C and 30D all have different back sizes, but share the same cup size. They are often referred to as ‘sister sizes’.
When changing bra sizes, always remember: If you change your back size, the cup size will also change.
For example: 34DD is a back size AND a cup size bigger than a 32DD
A = 1” difference
B = 2” difference
C = 3” difference
D = 4” difference
DD = 5” difference
E = 6” difference
F = 7” difference
G = 8” difference
The band is the anchor of your bra, where all the support comes from. It should fit snugly on the loosest setting, so you can move to the tighter clasps as it relaxes with wear. The front of your bra should always be level with the back band, even when you shrug your shoulders or move around.
The cups should fit smoothly with no gaping (too big) or bulging out of the top or sides (too small). If you’re wearing an underwire, they should be fitting flat against your ribs. If the wire-line is lifting away from your body or onto your breasts, your cups might be too small.
If you’re wearing a non-wire bra, you may experience the connecting seam at the center-front of the band lifts away from the body. However, this seam should fit flat against the body (not lifting onto the breast) from the base of the breast all the way to the underarm
If the cups and band are fitting well, they’ll be doing all the lifting. Your straps should just be resting on your shoulders, giving you about 2 inches of slack when raised off the body. If you’re still feeling a strain on your shoulders, check the fit of your band - it might be too loose.
Lift yourself up and into each bra cup. Tighten the straps so you have about 2” of slack on each side when the straps are lifted off your shoulders. If your cup size is still too large, go down a cup size.
Example: You’re wearing a 34D and the cups are puckering, but the back fits perfectly. Try going down a cup size to 34C.
Your cup size could be too small. Try going up a cup size or choose a bra style that offers more
coverage for example, a Classic bra, Balconette or Longline instead of a Demi Cup. Browse Bras
Example: You’re wearing a 34D and the back fits perfectly, but you’re bulging out of the top/sides of the cups. Go up a cup size to 34DD.
This is very common as left and right breasts are often different sizes. You should always fit to
the larger cup. Adjusting the straps or trying a style with a different fabric may help hide the difference.
Underwires tip away from your body at centre front? Your bra cups are too small. Try a larger cup size.
Example: You’re wearing a 34E and the back fits perfectly, but you’re bulging out of the top/sides of the cups. Go up a cup size to 34F.
Your band size is too large. Try going down a back size. The band should fit snugly enough that it lies parallel to the floor even after moving around and shrugging your shoulders.
Example: You’re wearing a 34E and the cups fit well but the band is too loose. Go up a cup size (to keep the same cup size) and down a back size to 32F.
If the straps are digging in or you’re feeling strain on your shoulders, it might be a sign that the under bust band is too big and not giving enough support.
Example: You’re wearing a 32E and the cups fit well but the straps are digging into your shoulders. Go up a cup size (to keep the same cup size) and down a back size to 30F.
If after being adjusted, the straps are slipping down your shoulders it might mean that your band size is too small. Try going up a band size and down a cup size to compensate.
Example: You’re wearing a 34E and the cups fit well but the straps are falling off your shoulders, go down a cup size (to keep the same cup size) and up
Example: If you’re wearing a 34E and finding the cups and band are too big. Go down a back size to 32E.
Example: If you’re wearing a 34E go down a back size to 32, and up two cup sizes to G (32G).
How To Change Sizes Depending On Your Fitting Needs
Go up a back size and down a cup size
Keep the same back size, but go up or down a cup size accordingly
Go up a back size
Go down a back size
Go down a back size and up two cup sizes
Go up a back size and down two cup sizes
Please Note: Bodysuit sizing is tricky as you're combining 3 different proportions (bust, bottom and torso) into one.
Please don't hesitate to contact us with questions, we're happy to help!
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