A Cup Bra Size Chart: 28A–46A and 60A–110A Explained
A cup bra sizes from 28A to 46A usually match EU/Asia bands from 60A to 105A, while 110A is commonly equivalent to 48A. All A cups are not the same volume: as the band size gets larger, the A cup also becomes larger.
What does an A cup bra size mean?
An A cup bra size means the bust measurement is usually about one cup step larger than the underbust measurement, but the actual cup volume changes with the band size.
In SG/MY shopping, you may see both UK/US sizes such as 32A and EU/Asia sizes such as 70A. The number shows the band size, while the letter A shows the cup category. A 28A, 34A, and 46A are all A cups, but they do not hold the same cup volume.
This is why it is more accurate to say “32A” or “70A” than simply “A cup”. The full size tells you both the ribcage measurement and the cup scale.
How do 28A–46A and 60A–110A match?
UK/US A cup sizes from 28A to 46A usually correspond to EU/Asia sizes from 60A to 105A, while 110A usually corresponds to 48A.
| UK/US A Cup Size | EU/Asia A Cup Size | Approx. Underbust Range | SG/MY Shopping Note |
|---|---|---|---|
| 28A | 60A | 58–62 cm | Very small band; may be harder to find in regular stores. |
| 30A | 65A | 63–67 cm | Small band with A cup volume; often suits petite frames. |
| 32A | 70A | 68–72 cm | Common small band size in SG/MY online size charts. |
| 34A | 75A | 73–77 cm | One of the most common A cup sizes in local shopping. |
| 36A | 80A | 78–82 cm | A wider band than 34A, with a larger A cup volume. |
| 38A | 85A | 83–87 cm | Still an A cup, but not the same cup volume as 32A or 34A. |
| 40A | 90A | 88–92 cm | Often needs a stable band and smooth cup edge for comfort. |
| 42A | 95A | 93–97 cm | The cup volume is larger than smaller-band A cup sizes. |
| 44A | 100A | 98–102 cm | Look for breathable support and a band that stays level. |
| 46A | 105A | 103–107 cm | Commonly the EU/Asia match for 46A, not 110A. |
| 48A | 110A | 108–112 cm | Included because many EU/Asia charts extend to 110A. |
Why are all A cups not the same size?
All A cups are not the same size because cup volume increases when the band size increases.
A 28A and a 46A both use the letter A, but they are built on very different band measurements. The 46A band is much wider, so the cup is scaled larger too. This is also why a person may fit one A cup size but not another.
| Example | Same Cup Letter? | Same Cup Volume? | Why |
|---|---|---|---|
| 28A vs 30A | Yes | No | 30A has a larger band, so the A cup volume is slightly larger. |
| 32A vs 34A | Yes | No | 34A is built on a wider band and holds more cup volume. |
| 34A vs 36A | Yes | No | 36A has a larger band and a larger scaled A cup. |
| 38A vs 42A | Yes | No | 42A is wider in the band and larger in cup volume. |
| 46A vs 110A | Yes | No | 46A usually equals 105A, while 110A is closer to 48A. |
What is the UK/US band and EU/Asia band conversion?
UK/US band sizes usually increase by 2 inches, while EU/Asia band sizes usually increase by 5 cm.
| UK/US Band | EU/Asia Band | Approx. Underbust Range | A Cup Example |
|---|---|---|---|
| 28 | 60 | 58–62 cm | 28A = 60A |
| 30 | 65 | 63–67 cm | 30A = 65A |
| 32 | 70 | 68–72 cm | 32A = 70A |
| 34 | 75 | 73–77 cm | 34A = 75A |
| 36 | 80 | 78–82 cm | 36A = 80A |
| 38 | 85 | 83–87 cm | 38A = 85A |
| 40 | 90 | 88–92 cm | 40A = 90A |
| 42 | 95 | 93–97 cm | 42A = 95A |
| 44 | 100 | 98–102 cm | 44A = 100A |
| 46 | 105 | 103–107 cm | 46A = 105A |
| 48 | 110 | 108–112 cm | 48A = 110A |
A cup size chart from 28A to 46A and 60A to 110A
This A cup size chart shows how each A cup band size converts across UK/US and EU/Asia sizing.
| Size Keyword | Equivalent Size | Approx. Underbust | Approx. A Cup Bust Difference | Fit Meaning |
|---|---|---|---|---|
| 28A | 60A | 58–62 cm | About 10–12.5 cm | Very small band and small A cup volume. |
| 30A | 65A | 63–67 cm | About 10–12.5 cm | Small band; often suited to petite ribcages. |
| 32A | 70A | 68–72 cm | About 10–12.5 cm | Common small A cup size in SG/MY sizing guides. |
| 34A | 75A | 73–77 cm | About 10–12.5 cm | Common A cup size for everyday bras. |
| 36A | 80A | 78–82 cm | About 10–12.5 cm | Larger band and larger A cup volume than 34A. |
| 38A | 85A | 83–87 cm | About 10–12.5 cm | Wider band with scaled A cup volume. |
| 40A | 90A | 88–92 cm | About 10–12.5 cm | Needs stable band support to prevent riding up. |
| 42A | 95A | 93–97 cm | About 10–12.5 cm | Larger A cup volume than smaller band sizes. |
| 44A | 100A | 98–102 cm | About 10–12.5 cm | Best checked with both band comfort and cup edge fit. |
| 46A | 105A | 103–107 cm | About 10–12.5 cm | Large band A cup; not the same volume as 28A or 32A. |
| 48A | 110A | 108–112 cm | About 10–12.5 cm | Often listed as 110A in EU/Asia charts. |
What does 28A mean?
28A usually means a 60A bra in EU/Asia sizing, with an approximate underbust range of 58–62 cm.
28A has one of the smallest band sizes and a smaller A cup volume. If 28A feels too tight in the band but the cup volume feels close, the sister size may be 30AA if available.
What does 30A mean?
30A usually means a 65A bra in EU/Asia sizing, with an approximate underbust range of 63–67 cm.
30A is a small band A cup size. It is not the same cup volume as 34A, even though both use the A cup letter.
What does 32A mean?
32A usually means a 70A bra in EU/Asia sizing, with an approximate underbust range of 68–72 cm.
32A is common for smaller ribcages. If 32A cups gape, the cup may be too deep or the bra style may be too structured for your shape.
What does 34A mean?
34A usually means a 75A bra in EU/Asia sizing, with an approximate underbust range of 73–77 cm.
34A is a common A cup size in SG/MY. It has more cup volume than 32A because the band is larger.
What does 36A mean?
36A usually means an 80A bra in EU/Asia sizing, with an approximate underbust range of 78–82 cm.
36A is still an A cup, but its cup volume is larger than 34A. If the band rides up, the band may be too loose even if the cup feels comfortable.
What does 38A mean?
38A usually means an 85A bra in EU/Asia sizing, with an approximate underbust range of 83–87 cm.
38A can suit a wider ribcage with modest bust difference. A smooth, breathable, wireless bra can feel more comfortable for daily SG/MY weather.
What does 40A mean?
40A usually means a 90A bra in EU/Asia sizing, with an approximate underbust range of 88–92 cm.
40A has a larger band and larger A cup volume than smaller A cup sizes. Look for a firm but gentle underband so the bra stays level.
What does 42A mean?
42A usually means a 95A bra in EU/Asia sizing, with an approximate underbust range of 93–97 cm.
42A is not simply a “small cup” in total volume. The cup letter is A, but the scaled cup volume is larger than 32A or 34A.
What does 44A mean?
44A usually means a 100A bra in EU/Asia sizing, with an approximate underbust range of 98–102 cm.
44A may need a balance of soft cups and stable band support. Seamless styles can help reduce bulk under clothing.
What does 46A mean?
46A usually means a 105A bra in EU/Asia sizing, with an approximate underbust range of 103–107 cm.
46A is larger in total cup volume than 28A, 30A, 32A, and 34A. Do not compare A cups by the letter alone.
What does 110A mean?
110A usually means a 48A bra in UK/US sizing, not 46A.
Many EU/Asia size charts include 110A as the next band after 105A. If you are comparing 28A–46A with 60A–110A, remember that 46A aligns with 105A, while 110A aligns with 48A.
Common A cup sizes explained
Common A cup sizes differ mainly by band size, cup scale, and how easy they are to find in stores.
| A Cup Size | EU/Asia Size | Common Fit Situation | What to Check |
|---|---|---|---|
| 28A | 60A | Petite ribcage, very small band | Check that the band is snug but not restrictive. |
| 30A | 65A | Small band with light cup volume | Check cup gaping and strap placement. |
| 32A | 70A | Small frame, common petite size | Choose shallow or soft cups if molded cups gap. |
| 34A | 75A | Common everyday A cup size | Check whether 34A or sister size 32B feels better. |
| 36A | 80A | Wider band with modest bust difference | Check that the band does not ride up. |
| 38A | 85A | Wider ribcage, A cup scale | Choose breathable fabric and a stable underband. |
| 40A | 90A | Larger band A cup | Check side coverage and cup edge smoothness. |
| 42A | 95A | Larger band with scaled cup volume | Check cup width and band comfort together. |
| 44A | 100A | Large band A cup | Look for supportive but soft construction. |
| 46A | 105A | Large band with larger A cup volume | Check whether the band stays level through movement. |
| 48A | 110A | Extended EU/Asia A cup band size | Check brand-specific availability and size chart details. |
How should an A cup bra fit?
An A cup bra should fit with a level band, smooth cup edge, comfortable straps, and no empty space or pressing at the cup.
| Fit Area | Good Fit | Possible Issue | What to Try |
|---|---|---|---|
| Band | Stays level around the body | Rides up at the back | Try a smaller band or adjust the hook. |
| Cups | Sit close without gaps | Empty space at the top | Try a shallower cup, soft cup, or one cup smaller. |
| Cup edge | Lies flat under clothing | Cuts into the bust | Try one cup larger or a softer cup edge. |
| Straps | Stay in place without digging | Slip often | Adjust straps or choose closer-set straps. |
| Under clothing | Looks smooth and natural | Cup line or wrinkles show | Try seamless or lightly padded bras. |
What sister sizes are close to A cup sizes?
Sister sizes are nearby sizes with similar cup volume but different band sizes.
For A cup bras, sister sizing is especially useful when the cup volume feels close but the band feels too tight or too loose. The usual rule is: go up one band and down one cup, or go down one band and up one cup.
| Current A Cup Size | Closest Sister Size Down Band | Closest Sister Size Up Band | Reminder |
|---|---|---|---|
| 30A / 65A | 28B / 60B | 32AA / 70AA if available | Availability of AA sizes varies by brand. |
| 32A / 70A | 30B / 65B | 34AA / 75AA if available | Useful if the 32 band feels wrong but cup volume feels close. |
| 34A / 75A | 32B / 70B | 36AA / 80AA if available | 34A and 32B can be close in cup volume. |
| 36A / 80A | 34B / 75B | 38AA / 85AA if available | Do not use sister sizing if both band and cup feel wrong. |
| 38A / 85A | 36B / 80B | 40AA / 90AA if available | A different bra style may help more than sister sizing. |
| 40A / 90A | 38B / 85B | 42AA / 95AA if available | Check band support before changing cup letter. |
| 42A / 95A | 40B / 90B | 44AA / 100AA if available | Sister sizes keep volume close but change support. |
| 44A / 100A | 42B / 95B | 46AA / 105AA if available | Use the brand size chart when available. |
| 46A / 105A | 44B / 100B | 48AA / 110AA if available | Extended sizes vary more between brands. |
Which bra styles work well for A cup sizes?
The best bra styles for A cup sizes are seamless, wireless, lightly padded, soft cup, and shallow T-shirt bras.
For A cup wearers in Singapore and Malaysia, comfort often depends on cup shape as much as size. Stiff molded cups may gap if the cup is too deep, even when the label says A. Softer, smoother styles can follow the body more naturally.
| Bra Style | Why It Helps A Cup Sizes | Best For |
|---|---|---|
| Seamless bra | Smooth cups reduce visible edges and can sit closer to the body. | Everyday wear, T-shirts, uniforms, SG/MY heat |
| Wireless bra | Flexible support is often enough for A cup sizes. | Long wear, workdays, travel, home |
| Lightly padded bra | Light padding gives coverage without heavy shaping. | Natural shape under thin tops |
| Soft cup bra | Soft cups adapt better if molded cups leave gaps. | Small bust, shallow shape, relaxed fit |
| Shallow T-shirt bra | A lower-depth cup can fit A cups more smoothly. | Clean look under fitted clothes |
Which Veimia bras are suitable for A cup sizes?
Veimia seamless bras are a comfortable starting point for A cup sizes because they focus on smooth fit, soft support, and everyday wearability.
If you wear 28A, 30A, 32A, 34A, 36A, 38A, 40A, 42A, 44A, 46A, or EU/Asia sizes such as 60A to 110A, start by checking the Veimia seamless bra collection. Look for seamless, wireless, lightly padded, breathable, and soft cup features if you want gentle shaping without bulky structure.
The right A cup bra should feel secure without pressing, smooth without gaping, and comfortable enough for humid SG/MY daily wear.
FAQ
Is 34A the same as 75A?
Yes, 34A usually matches 75A in EU/Asia sizing. The 34 band is commonly converted to a 75 band.
Is 46A the same as 110A?
No, 46A usually matches 105A. The size 110A usually corresponds to 48A in UK/US sizing.
Are all A cup bras the same size?
No, all A cup bras are not the same size. A cup volume increases as the band size increases, so 34A is larger in cup volume than 28A.
What is the difference between 32A and 34A?
32A and 34A both use the A cup letter, but 34A has a larger band and a larger A cup volume than 32A.
What is the sister size of 34A?
The closest sister size of 34A is usually 32B if you need a smaller band with similar cup volume. 36AA may be another option if available.
What bra style is best for A cup?
Seamless, wireless, lightly padded, soft cup, and shallow T-shirt bras often work well for A cup because they reduce gaping and feel natural.
