✓ Sister size finder

Free Bra Size Calculator in Pakistan

A bra size is a size number and a cup size, worked out from two tape measurements. The bra size calculator below takes your underbust and bust in inches and returns your size number, your cup and the sister sizes either side of it.

Underbust measurement for the bra size calculator, with the tape held level on the ribcage directly under the bust
Underbust: tape level on the ribcage, directly under the bust
Bust measurement with the tape around the fullest part of the bust, held level at the front
Bust: tape around the fullest part, held level at the front

Bra Size Calculator

The calculator returns a size number and a cup size. Three ways in, depending on what you have to hand.

in
in

How to measure your bra size

Measuring a bra size takes a tape and two numbers. Measure your underbust in inches for the size number, measure your bust at the fullest part for the cup, and subtract the first from the second. Each inch of difference is one cup size, so a three-inch difference is a C cup.

1

Find the crease directly under the bust. Take the measuring tape round the ribcage at that line, level and snug, not pulled tight. Read the number in inches. Round the reading to the nearest inch. That is your underbust.

2

Add 4 inches to an even underbust measurement, or 5 inches to an odd one. That gives the size number. An underbust of 32 inches gives a size 36, and an underbust of 31 inches gives the same 36.

3

Measure around the fullest part of your bust, keeping the tape level across your back and flat against the body.

4

Subtract the size number from the bust. One inch is an A cup, two inches a B, three inches a C, four inches a D, and so on up the chart.

Measuring tape lying level across the back, parallel to the floor rather than sloping

Measure without a bra, or in a non-padded one. A second pair of hands helps with the reading across the back. Keep the tape parallel to the floor rather than sloping.

A note on the method

Note that this calculator adds 4 to an even underbust measurement and 5 to an odd one, which is the convention most bra labels sold in Pakistan are cut to. Several international brands add nothing at all, so a size worked out here can read one size smaller on an imported label.

Bra size chart for Pakistan, in inches and cm

Every extra inch of difference between bust and size number is one cup size. A 36-inch bust on a size 34 is a two-inch gap, which is a B cup.

Two bars comparing a 36-inch bust with a size 34. The 2-inch gap between them is a B cup. bust 36" size number 34" 2" = B cup every extra inch is one cup size
Cup SizeDifference (cm)Difference (inches)Pakistani Sizes
AA0-2.50-128AA, 30AA, 32AA, 34AA, 36AA, 38AA, 40AA, 42AA, 44AA, 46AA, 48AA, 50AA
A2.5-51-228A, 30A, 32A, 34A, 36A, 38A, 40A, 42A, 44A, 46A, 48A, 50A
B5-7.52-328B, 30B, 32B, 34B, 36B, 38B, 40B, 42B, 44B, 46B, 48B, 50B
C7.5-103-428C, 30C, 32C, 34C, 36C, 38C, 40C, 42C, 44C, 46C, 48C, 50C
D10-12.54-528D, 30D, 32D, 34D, 36D, 38D, 40D, 42D, 44D, 46D, 48D, 50D
DD/E12.5-155-628DD, 30DD, 32DD, 34DD, 36DD, 38DD, 40DD, 42DD, 44DD, 46DD, 48DD, 50DD
F15-17.56-728F, 30F, 32F, 34F, 36F, 38F, 40F, 42F, 44F, 46F, 48F, 50F
G17.5-207-828G, 30G, 32G, 34G, 36G, 38G, 40G, 42G, 44G, 46G, 48G, 50G

Size numbers and cup sizes

A bra size is written as a number and a letter. The number is the size number, which runs 28 to 50 in even steps and describes the measurement around the ribcage. The letter is the cup, which runs AA to G and describes the difference between the bust and the size number. In 34C, 34 is the size number and C is the cup.

Bra sizing in Pakistan follows the UK and US conventions and is measured in inches. No separate Pakistani national standard exists.

Sister sizes, and when to use one

32C, 34B and 36A hold the same cup volume on different size numbers. 32C smaller size 34B your size 36A larger size the cup holds the same volume in all three

A sister size is the same cup volume on a different size number. Move down one size number and up one cup, or up one size number and down one cup, and the volume stays the same, so 34B, 32C and 36A all hold the same cup. The difference between bust and size number sets the cup size, which is why the letter moves when the size number does.

Sister sizes matter most when a size is out of stock. If 34B is unavailable, 32C is the closest fit and sits tighter around the ribcage. If the band digs in but the cups fit, going up a size number and down a cup keeps the volume and returns the comfort.

Why so many women wear the wrong bra size in Pakistan

Wearing the wrong bra size leads to daily discomfort, back pain and poor posture. Proper fitting guidance is hard to find in Pakistani markets, which is why we built this calculator.

Common bra sizing mistakes

Guessing a size from previous purchases instead of measuring.
Treating the size as fixed, when it moves with weight, age and hormones.
Skipping the 4 or 5 inches that turn an underbust measurement into a size number.
Settling for whatever is on the shelf, and wearing 34B when the measurements give 32C.

When to re-measure your bra size

A bra size is not permanent. Weight changes of about 5kg or more, pregnancy, breastfeeding and hormonal shifts all move it, and a fresh measurement every 6 to 12 months keeps the size current.

Signs of a wrong bra size

A band that rides up at the back is too big.
Straps that dig into the shoulders are carrying weight the band should hold.
Breast tissue spilling over the top or the sides means the cup is too small.
Gaps or wrinkles in the cup fabric mean the cup is too big.

Pakistani Bra Size Conversion Chart

Pakistani labels use the UK and US size numbers, so a size worked out here transfers directly to a UK or US chart. European, French and Italian labels number the same size differently.

PK / UK / USEuropeanFrenchItalian
3270851
3475902
3680953
38851004

Shopping for your size at Pink Pearl

What is in stock changes as styles sell out and new ones arrive, so every product page lists the sizes available today. Use the result above to open the bras in your size, and check a sister size when your own is sold out.

Delivery takes 3 to 5 business days, with free shipping on orders of Rs 4,999 and above and Rs 300 on orders below Rs 4,999. Exchanges are accepted within 7 days of delivery, and you can pay Cash on Delivery, or online for 10% off.

Cash on Delivery Exchange within 7 days of delivery 3 to 5 business days

Questions about bra size

If yours is not here, message us on WhatsApp or email orders@pinkpearl.pk.

How do I calculate my bra size in Pakistan?
Measure your underbust in inches. If it’s even, add 4; if odd, add 5. This gives your size number. Then measure your bust at the fullest part. The difference between the bust measurement and the size number determines your cup size: 1 inch = A cup, 2 inches = B cup, 3 inches = C cup and so on.
Which cup size is bigger, B or C or D?
D is the largest of the three. Cup sizes run in order of the difference between bust and size number, so B is 2 to 3 inches, C is 3 to 4 inches and D is 4 to 5 inches. Each letter up the chart adds about one inch.
What is 34B in centimetres?
A 34B has a size number of 34, which is 34 inches, about 86 cm, around the ribcage, and the bust measures 2 to 3 inches more, about 91 to 94 cm. The underbust that produces a size 34 is 30 inches, about 76 cm.
How often should I measure my bra size?
Every 6 to 12 months, and after weight changes of about 5kg or more, pregnancy, breastfeeding or hormonal shifts. Measure again whenever bras that used to fit stop feeling right.
What is the difference between padded and non-padded sizing?
The label reads the same, but the fit does not. Padded bras add volume, so moving from a padded bra to a non-padded one in the same size often needs one cup more to keep the same shape.

Shop your size

Each link goes to bras in the size this calculator returned, or in the sizes either side of it. A faded size has nothing in stock right now.

28 32 34 36 38 40 42 44 46 48 50 All bras
Last updated 9 September 2026