Knix Bra Size Chart
Knix bra size chart for wireless, sports, and everyday bras. Convert Knix sizes across US, UK, EU, and AU systems. Includes Evolution Bra sizing guide.
Sizes shown are based on standard US bra sizing. Knix may vary slightly — check Knix's official size chart for exact measurements.
Find Your Knix Bra Size
Enter your measurements or convert from another brand.
How to Measure for Knix
Measure your bust
Wrap a tape around the fullest part of your bust. Keep it level and not too tight.
Measure your underbust
Wrap the tape snugly around your ribcage, just below your breasts. Keep it level.
Enter your measurements
Use our calculator to get your size in US, UK, EU, and AU systems with sister sizes.
Knix Size Chart
Data verified Apr 2026 · Official size guide · See an error? Report it
| US | UK | EU | AU | Bust (cm) | Underbust (cm) |
|---|---|---|---|---|---|
| 28A | 28A | 60A | 6A | 73 | 58 |
| 28B | 28B | 60B | 6B | 75 | 58 |
| 28C | 28C | 60C | 6C | 78 | 58 |
| 28D | 28D | 60D | 6D | 80 | 58 |
| 28DD | 28DD | 60E | 6DD | 83 | 58 |
| 28DDD | 28E | 60F | 6E | 85 | 58 |
| 28G | 28F | 60G | 6F | 88 | 58 |
| 28H | 28FF | 60H | 6FF | 90 | 58 |
| 30A | 30A | 65A | 8A | 78 | 63 |
| 30B | 30B | 65B | 8B | 80 | 63 |
| 30C | 30C | 65C | 8C | 83 | 63 |
| 30D | 30D | 65D | 8D | 85 | 63 |
| 30DD | 30DD | 65E | 8DD | 88 | 63 |
| 30DDD | 30E | 65F | 8E | 90 | 63 |
| 30G | 30F | 65G | 8F | 93 | 63 |
| 30H | 30FF | 65H | 8FF | 95 | 63 |
| 30I | 30G | 65I | 8G | 98 | 63 |
| 32A | 32A | 70A | 10A | 83 | 68 |
| 32B | 32B | 70B | 10B | 85 | 68 |
| 32C | 32C | 70C | 10C | 88 | 68 |
| 32D | 32D | 70D | 10D | 90 | 68 |
| 32DD | 32DD | 70E | 10DD | 93 | 68 |
| 32DDD | 32E | 70F | 10E | 95 | 68 |
| 32G | 32F | 70G | 10F | 98 | 68 |
| 32H | 32FF | 70H | 10FF | 100 | 68 |
| 32I | 32G | 70I | 10G | 103 | 68 |
| 34A | 34A | 75A | 12A | 88 | 73 |
| 34B | 34B | 75B | 12B | 90 | 73 |
| 34C | 34C | 75C | 12C | 93 | 73 |
| 34D | 34D | 75D | 12D | 95 | 73 |
| 34DD | 34DD | 75E | 12DD | 98 | 73 |
| 34DDD | 34E | 75F | 12E | 100 | 73 |
| 34G | 34F | 75G | 12F | 103 | 73 |
| 34H | 34FF | 75H | 12FF | 105 | 73 |
| 34I | 34G | 75I | 12G | 108 | 73 |
| 36A | 36A | 80A | 14A | 93 | 78 |
| 36B | 36B | 80B | 14B | 95 | 78 |
| 36C | 36C | 80C | 14C | 98 | 78 |
| 36D | 36D | 80D | 14D | 100 | 78 |
| 36DD | 36DD | 80E | 14DD | 103 | 78 |
| 36DDD | 36E | 80F | 14E | 105 | 78 |
| 36G | 36F | 80G | 14F | 108 | 78 |
| 36H | 36FF | 80H | 14FF | 110 | 78 |
| 36I | 36G | 80I | 14G | 113 | 78 |
| 38A | 38A | 85A | 16A | 98 | 83 |
| 38B | 38B | 85B | 16B | 100 | 83 |
| 38C | 38C | 85C | 16C | 103 | 83 |
| 38D | 38D | 85D | 16D | 105 | 83 |
| 38DD | 38DD | 85E | 16DD | 108 | 83 |
| 38DDD | 38E | 85F | 16E | 110 | 83 |
| 38G | 38F | 85G | 16F | 113 | 83 |
| 38H | 38FF | 85H | 16FF | 115 | 83 |
| 38I | 38G | 85I | 16G | 118 | 83 |
| 40A | 40A | 90A | 18A | 103 | 88 |
| 40B | 40B | 90B | 18B | 105 | 88 |
| 40C | 40C | 90C | 18C | 108 | 88 |
| 40D | 40D | 90D | 18D | 110 | 88 |
| 40DD | 40DD | 90E | 18DD | 113 | 88 |
| 40DDD | 40E | 90F | 18E | 115 | 88 |
| 40G | 40F | 90G | 18F | 118 | 88 |
| 40H | 40FF | 90H | 18FF | 120 | 88 |
| 40I | 40G | 90I | 18G | 123 | 88 |
| 42B | 42B | 95B | 20B | 110 | 93 |
| 42C | 42C | 95C | 20C | 113 | 93 |
| 42D | 42D | 95D | 20D | 115 | 93 |
| 42DD | 42DD | 95E | 20DD | 118 | 93 |
| 42DDD | 42E | 95F | 20E | 120 | 93 |
| 42G | 42F | 95G | 20F | 123 | 93 |
| 42H | 42FF | 95H | 20FF | 125 | 93 |
| 42I | 42G | 95I | 20G | 128 | 93 |
| 44B | 44B | 100B | 22B | 115 | 98 |
| 44C | 44C | 100C | 22C | 118 | 98 |
| 44D | 44D | 100D | 22D | 120 | 98 |
| 44DD | 44DD | 100E | 22DD | 123 | 98 |
| 44DDD | 44E | 100F | 22E | 125 | 98 |
| 44G | 44F | 100G | 22F | 128 | 98 |
| 44H | 44FF | 100H | 22FF | 130 | 98 |
| 44I | 44G | 100I | 22G | 133 | 98 |
How Knix Sizing Compares
If you wear a 34C in Knix, here's your likely size in other popular brands:
| Brand | US Size | UK Size | EU Size | Fit |
|---|---|---|---|---|
| Knix | 34C | 34C | 75C | true to size |
| Victoria's Secret | 34C | 34C | 75C | true to size |
| Calvin Klein | 34C | 34C | 75C | true to size |
| ThirdLove | 34C | 34C | 75C | true to size |
| Savage x Fenty | 34C | 34C | 75C | true to size |
| Wacoal | 34C | 34C | 75C | true to size |
Sizes shown use standard charts. Actual fit may vary by style — always check the brand's specific size guide.
Knix Sizing & Fit Guide
Knix bras use both traditional band/cup sizing and S-XL sizing depending on the style. Their wireless bras tend to run true to size. The Evolution Bra uses a simplified 1-8 sizing system. For underwire styles, Knix follows standard sizing.
View Knix's official size guide