Bra Size Chart & How to Measure Bra Size at Home

Wearing the right bra size makes a big difference in comfort, support, and shape. The wrong size can cause problems like spillage, gaping, and even back pain. Many women wear the wrong size without realizing it. A simple way to fix this is by measuring at home using a bra size chart. It’s easy and helps find the perfect fit for everyday comfort.

How to Measure Bra Size at Home (Step-by-Step)

Finding your bra size isn’t as hard as it seems. You just need a measuring tape, a mirror, and a non-padded bra to get started. Follow these simple steps to get the right size!

Step 1: Use a Measuring Tape in CM

Always measure in centimeters (cm) instead of inches. This gives more accuracy.

Step 2: Wear a Normal Bra

Make sure you’re wearing a regular bra (not heavily padded) when measuring. A padded bra can give the wrong size.

Step 3: Measure Your Band Size (Under Bust)

• Wrap the measuring tape tightly around your ribcage, just under your bust.
• Make sure the tape is straight and snug but not too tight.
• Check your measurement in cm.
• Now, match it with a bra size chart to find your band size.
  • Example: If your under bust is 76 cm, your band size is 34.

Step 4: Measure Your Bust (Fullest Part of the Breast)

• Wrap the tape loosely around the fullest part of your bust.
• Keep the tape straight but don’t pull too tight.

Step 5: Calculate Your Cup Size

• Subtract your band size (under bust measurement) from your bust size.
• If the difference is an odd number, round it to the nearest even number.
• Use the chart below to find your cup size.
  
  

Difference (cm)	Cup Size
10-12 cm	A
12-14 cm	B
14-16 cm	C
16-18 cm	D
18-20 cm	DD
20-22 cm	E
22-24 cm	F
24-26 cm	G

Example Calculation:

• Under bust: 76 cm → Band size 34
• Bust size: 90 cm
• Difference: 90 – 76 = 14 cm
• Cup size = C

So, the final bra size is 34C.

Final Tips

• Always measure in front of a mirror to keep the tape straight.
• If your bra feels too tight or loose, you may need a sister size (one band size up, one cup size down).
• Different brands may have slight variations, so always check their size guide.

With these simple steps, you’ll never struggle with the wrong bra size again!

 

FAQs: Everything You Need to Know About Bra Sizes

Q1. How can I know my bra size at home without a measuring tape?

If you don’t have a measuring tape, try these tricks:

• Use a string or ribbon to measure and compare it with a ruler.
• Check how your current bra fits. If it’s too tight, loose, or uncomfortable, you might need a new size.
• Look for signs like gapping cups, slipping straps, or a band that rides up—these indicate the wrong fit.

Q2. What is the difference between bust size and bra size?

• Bust size is the full measurement around your chest at the fullest part.
• Bra size includes both band size (under bust) and cup size (difference between bust and band size).
• Two people with the same bust size might wear different bra sizes depending on their under bust measurement.

Q3. How do I measure my bra size correctly?

Follow these easy steps:

1. Measure your band size (under bust) – Wrap the measuring tape snugly under your bust in cm.
2. Measure your bust size (fullest part) – Keep the tape loose for accuracy.
3. Calculate cup size – Subtract the band size from the bust size to find the cup size.
4. Use a size chart – Match your measurements to a bra size chart to find your perfect fit.

Q4. What are sister sizes, and why do they matter?

Sister sizes are alternative bra sizes that maintain the same cup volume but have different band sizes.

• If your bra is too tight, try going one band size up and one cup size down (e.g., 34C → 36B).
• If your bra is too loose, go one band size down and one cup size up (e.g., 36B → 34C).

Q5. Why do bra sizes vary across brands?

• Brands have different size charts, so a 34B in one brand may fit like a 32C in another.
• The bra’s cut, fabric, and style also affect how it fits.
• Always check the brand’s size guide before buying.

Q6. What is the most accurate bra size calculator?

The most accurate method is measuring manually and using a trusted bra size chart. Online calculators can help, but they may not consider all factors like boob shape and band stretch.

Q7. What is the average bust size for women in different countries?

Bust sizes vary across regions due to body structure, genetics, and lifestyle. For example:

• US & UK: 34DD
• Europe: 34C–D
• Asia (Pakistan, India, China): 32B–34B

Q8. Why does my bra gap at the cups?

Cup gaping happens when:

• The cup is too big for your bust.
• The bra style doesn’t match your breast shape.
• The straps are too loose.

Solution: Try a smaller cup size, adjust the straps, or switch to a different style (like a plunge or balconette bra).

Q9. Why do my bra straps dig into my shoulders?

This happens when:

• The band is too loose, making the straps hold all the weight.
• The straps are too tight.

Solution: Go for a tighter band so the support comes from the band, not just the straps. Try bras with wider, cushioned straps for comfort.

Q10. Why does my bra band ride up?

A band that rides up means:

• The band is too loose or stretched out.
• The straps are pulling the bra upwards.

Solution: Try a smaller band size and adjust the straps to sit comfortably on your shoulders.

Q 11. How to measure bra cup size at home?

Measure your band size (under bust) and bust size (fullest part). Subtract the band size from the bust size to get your cup size using a bra size chart.