Wireless Bra Size Chart - Find The Perfect Wireless Bra For Your Breast Size | ThirdLove – Thirdlove
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Bralette Size Chart
| 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | |
|---|---|---|---|---|---|---|---|---|---|---|
| AA | ||||||||||
| A | S | M | ||||||||
| A½ | S | M | ||||||||
| B | S | M | L | XL | 1X | 2X | 3X | 3X | ||
| B½ | S | M | L | XL | ||||||
| C | XS | S | M | L | XL | 1X | 2X | 3X | 3X | |
| C½ | XS | S | M | L | ||||||
| D | XS | S | M | L | XL | 2X | 3X | 3X | 3X | |
| D½ | XS | S | M | |||||||
| E | S | M | L | XL | 1X | 2X | 3X | 3X | ||
| E½ | S | M | ||||||||
| F | S | M | L | XL | 1X | 2X | 3X | |||
| G | ||||||||||
| H | ||||||||||
| I |
Bralette Size Chart: sizes by band (columns) and cup (rows)
How ThirdLove Bra Sizing Works
How our Bra Size Calculator finds your size, so you can measure yourself and read ThirdLove sizes.
How to Measure Your Band and Cup Size
All you need is a soft measuring tape. Measure in inches.
Find your band size. Wrap the tape around your body, just under where the bra band lays (your underbust). Make sure the tape is level with the floor and isn't hiking or falling in the back. Find your underbust measurement in the band size chart (step 1).
Find your cup size. Wrap the tape around the fullest part of your bust. Make sure the tape is level with the floor and fits snugly. Subtract your underbust measurement from your bust measurement, then find the difference in your band's column of the bra size chart (step 2).
For example, an underbust of 31 in is a 34 band. With a bust of 36.25 in, the difference is 5.25 in, which is a 34C.
Our Bra Size Calculator does the same math for you: enter both measurements in inches.
| Underbust (in) | Band size |
|---|---|
| 24.9 – 28.5 | 30 |
| 28.5 – 30.5 | 32 |
| 30.5 – 32.5 | 34 |
| 32.5 – 34.5 | 36 |
| 34.5 – 36.5 | 38 |
| 36.5 – 38.5 | 40 |
| 38.5 – 40.5 | 42 |
| 40.5 – 42.5 | 44 |
Step 1: Band size by underbust measurement (inches). Each range excludes its lower value and includes its upper value.
| Bust − underbust (in) | Band 30 | Band 32 | Band 34 | Band 36 | Band 38 | Band 40 | Band 42 | Band 44 |
|---|---|---|---|---|---|---|---|---|
| Up to 2.5 | 34AA | |||||||
| 2.5 – 3 | 30B* | 32A* | 34AA* | |||||
| 3 – 3.5 | 30C | 32B | 34A | |||||
| 3.5 – 4 | 30C½ | 32B½ | 34A½ | |||||
| 4 – 4.5 | 30D | 32C | 34B | 36A* | ||||
| 4.5 – 5 | 30D | 32C½ | 34B½ | 36A½ | ||||
| 5 – 5.5 | 30E | 32D | 34C | 36B | 38A* | |||
| 5.5 – 6 | 30E½ | 32D½ | 34C½ | 36B½ | 38A½ | |||
| 6 – 6.5 | 30F | 32E | 34D | 36C | 38B | |||
| 6.5 – 7 | 30F | 32E½ | 34D½ | 36C½ | 38B½ | |||
| 7 – 8 | 30G | 32F | 34E | 36D | 38C | 40B* | ||
| 8 – 9 | 32G | 34F | 36E | 38D | 40C | 42B* | ||
| 9 – 10 | 34G | 36F | 38E | 40D | 42C | 44B* | ||
| 10 – 11 | 34H | 36G | 38F | 40E | 42D | 44C | ||
| 11 – 12 | 36H | 38G | 40F | 42E | 44D | |||
| 12 – 13 | 38H | 40G | 42F | 44E |
Step 2: Bra size by band and by bust minus underbust (inches). Each range excludes its lower value and includes its upper value.
\* Also the result when the difference is exactly 2.5 in: 30B, 32A, 34AA;
4 in: 36A;
5 in: 38A;
7 in: 40B;
8 in: 42B;
9 in: 44B.
The calculator only gives a size for an underbust over 24.9 in, up to 42.5 in, with a difference of up to 13 in. Blank cells and measurements outside these ranges have no size in the calculator.
Sister Sizes
Sister sizes have the same cup volume on a different band. One band size up and one cup letter down gives a sister size, and so does one band size down and one cup letter up: 32D, 34C and 36B are sister sizes. Half cups keep their half, so 32D½, 34C½ and 36B½ are sister sizes too.
If your band rides up in the back but the cups fit well, try going down a band size and up a cup size for an equivalent volume (your sister size).
Sister sizes among the sizes our Bra Size Calculator gives (each line has the same cup volume):
- 30B, 32A, 34AA
- 30C, 32B, 34A
- 30C½, 32B½, 34A½
- 30D, 32C, 34B, 36A
- 32C½, 34B½, 36A½
- 30E, 32D, 34C, 36B, 38A
- 30E½, 32D½, 34C½, 36B½, 38A½
- 30F, 32E, 34D, 36C, 38B
- 32E½, 34D½, 36C½, 38B½
- 30G, 32F, 34E, 36D, 38C, 40B
- 32G, 34F, 36E, 38D, 40C, 42B
- 34G, 36F, 38E, 40D, 42C, 44B
- 34H, 36G, 38F, 40E, 42D, 44C
- 36H, 38G, 40F, 42E, 44D
- 38H, 40G, 42F, 44E
ThirdLove Half Cup Sizes
ThirdLove created half cup sizes to help every bra wearer find the right size for their body. In between cup sizes? Go up or down a half cup.
A half cup sits halfway between two whole cups on the same band. On a 34 band, a difference between bust and underbust of 5–5.5 in gives a 34C, 5.5–6 in a 34C½ and 6–6.5 in a 34D.
| Band | Half cup sizes |
|---|---|
| 30 | 30C½, 30E½ |
| 32 | 32B½, 32C½, 32D½, 32E½ |
| 34 | 34A½, 34B½, 34C½, 34D½ |
| 36 | 36A½, 36B½, 36C½ |
| 38 | 38A½, 38B½ |
Half cup sizes our Bra Size Calculator gives, by band
Cup Letter Equivalents
After D, ThirdLove cup sizes use single letters: E, F, G and H. Our size selectors show each one next to its multiple-D letters.
| ThirdLove cup | Same as |
|---|---|
| E | DD |
| E½ | DD½ |
| F | DDD |
| G | DDDD |
| H | DDDDD |
ThirdLove cup letters and their multiple-D equivalents
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