Bra size & Fit Guide

It is estimated that up to 80% of women are wearing the wrong size bra. Investing in a correctly fitted bra is essential for comfort, support, breast health, improved appearance, and increased confidence. It is recommended that bra size is checked at least once a year to ensure the right size and fit, as changes in weight, pregnancy, and a range of other factors can impact bra size. It is also important you choose the right bra for your body shape and activity, for more information about our bra styles and functions, please see the Lingerie Buying Guide.

Bra Size Calculator

Finding your bra size can be tricky, and what fits perfectly in one brand or style, may not in another. We recommend you get measured in-store by one of our Farmers fitting consultants, however, if you’d prefer to measure yourself, this helpful calculator will give you a good indication of your correct bra size. If you’d like to find out more about our fitting service, please view our In-Store Bra Fitting information.

How to measure Your Bra Size

Wear a non-padded bra and stand in front of a mirror with a measuring tape. Take your measurements (in cms) as shown below and enter them into our helpful calculator, or if you prefer, use the Bra Size Chart below to find your size.

Illustration showing how to measure your band size with a measuring tape under the bust

Step 1 Measure your band size

Measure your chest directly under your bust. Ensure the tape is level and exhale completely.

Illustration showing how to measure your cup size with a measuring tape around the fullest part of the bust

Step 2 Measure your cup size

Measure your chest around the fullest part of your bust. Ensure the tape is level all around.

Calculate your bra size

Sorry, we can't identify a standard bra size for you. Try remeasuring, then try decreasing your band size and increasing your cup size by a centimetre or two to allow for the typical margin of error. Otherwise, ask a friend to help or head in for a professional bra fitting at your local Farmers store.

Your starting size is

Your measurements are only a guide – but an essential starting point. Bra sizes vary between brands and bra types – visit our instore fitting consultants to help you get the right size and style for your shape.

Bra Size Chart

Our bra chart is in centimetres


There is no universal system for measuring bra size, a bra that fits in one brand may not fit in another. Before you buy a bra from a brand you’ve never tried before, please check the brand-specific Size Guide that is included on every product page.

NZ Underbust AA A B C D DD E F
8 65-67 75-77 77-79 79-81 81-83 83-85 85-87 87-89 89-91
10 67-72 80-82 82-84 84-86 86-88 88-90 90-92 92-94 94-96
12 72-77 85-87 87-89 89-91 91-93 93-95 95-97 97-99 99-101
14 77-82 90-92 92-94 94-96 96-98 98-100 100-102 102-104 104-106
16 82-87 97-99 99-101 101-103 103-105 105-107 107-109 109-111
18 87-92 102-104 104-106 106-108 108-110 110-112 112-114 114-116
20 92-97 107-109 109-111 111-113 113-115 115-117 117-119 119-121
22 97-102 112-114 114-116 116-118 118-120 120-122 122-124 124-126
24 102-107 119-121 121-123 123-125 125-127 127-129 129-131
26 107-111 124-126 126-128 128-130 130-132 132-134 134-136

The Right Bra Fit

A well-fitting bra ensures comfort and support throughout the day. It should not dig into your skin, create painful pressure points, or cause discomfort. The right bra will provide the necessary support without causing any discomfort or irritation.

Illustration showing an incorrect underband fit where the band rides up at the back
Illustration showing a correct underband fit where the band sits level at the back
  • The band slides up when you lift your arms or move; consider going down a band size.
  • If the band feels tight, consider going up a band size.
  • The band should not dig in and should fit comfortably around your body, giving you the support you need.
Illustration showing an incorrect cup fit where the cups do not provide proper support
Illustration showing a correct cup fit where the cups provide proper support
  • If the Bra cups have excess fabric around or above the breast, consider going down a cup size.
  • If the breasts spill out over the cups at the front and sides, consider going up two cup sizes.
Illustration showing an incorrect strap fit where the straps are too tight or too loose
Illustration showing a correct strap fit where the straps are adjusted properly
  • If the Bra straps dig into your shoulders, consider going up a cup size and down a band size.
  • Straps shouldn’t slide off; consider going down a cup size and up a band size.
Illustration showing an incorrect underwire fit where the underwire digs into the breast
Illustration showing a correct underwire fit where the underwire sits comfortably around the breast without digging in
  • If Wires dig in around the breast, consider going up a cup size.
  • The Bust shouldn’t drop beneath the wires when arms are raised; consider going down a band size if this occurs.

In-Store Bra Fittings

Being fitted for a bra can seem like a daunting process for some, but the right bra can dramatically impact your confidence through the way you look and feel. Over time, bodies change so it’s important to get correctly fitted by a Farmers Bra Fitting Consultant.

Simply head to the Lingerie department and ask one of our bra fitting consultants for a fitting. It’s a good idea to call ahead to make sure a consultant is available. For the most accurate measurement, we recommend wearing a regular bra without any push-up padding.

A trained bra fitting consultant will measure you in the privacy of a changing room, taking measurements around your chest, under your bust, and across the fullest part to determine the most accurate starting size for trying on bras.

If you prefer not to have a fitting, you can use our Bra Size Calculator above for a convenient alternative.

In-store, we also provide paper measuring tapes if you’d rather take your own measurements.

Once your size is measured, your bra fitting consultant will ask about your style preferences and recommend a few options for you to try on. Keep in mind that sizing can vary between styles and brands, so it’s always best to try each bra to find the perfect fit.