How to Measure
Measure Your Band Size
Wrap the tape measure snugly around your ribcage, directly under your bust. This is your band measurement in inches. Round to the nearest even number.
Measure Your Bust Size
Measure loosely around the fullest part of your bust, keeping the tape parallel to the ground and not pulled too tight.
Calculate Your Cup Size
Subtract your band measurement from your bust measurement. Each inch corresponds to a cup size: 1"=A, 2"=B, 3"=C, 4"=D, 5"=DD/E, 6"=F, 7"=G.
Combine for Your Size
Your bra size is your band number + cup letter. For example, 34" band + 3" difference = 34C.
Use a soft measuring tape for accurate results
Bra Size Calculator
Bra Size Chart
| Band Size | A | B | C | D | DD / E | F | G |
|---|---|---|---|---|---|---|---|
| 30 | 30A | 30B | 30C | 30D | 30DD | 30F | 30G |
| 32 | 32A | 32B | 32C | 32D | 32DD | 32F | 32G |
| 34 | 34A | 34B | 34C | 34D | 34DD | 34F | 34G |
| 36 | 36A | 36B | 36C | 36D | 36DD | 36F | 36G |
| 38 | 38A | 38B | 38C | 38D | 38DD | 38F | 38G |
| 40 | 40A | 40B | 40C | 40D | 40DD | 40F | 40G |
| 42 | 42A | 42B | 42C | 42D | 42DD | 42F | 42G |
| 44 | 44A | 44B | 44C | 44D | 44DD | 44F | 44G |
| 46 | 46A | 46B | 46C | 46D | 46DD | 46F | 46G |
Panty Size Guide
| Lumière Size | UK Size | US Size | EU Size | Hip (inches) | Waist (inches) |
|---|---|---|---|---|---|
| XS | 6 | 0-2 | 32-34 | 33-35" | 24-26" |
| S | 8-10 | 4-6 | 36-38 | 35-37" | 26-28" |
| M | 12 | 8 | 40 | 37-39" | 28-30" |
| L | 14 | 10-12 | 42-44 | 39-42" | 30-33" |
| XL | 16 | 14 | 46 | 42-45" | 33-36" |
| XXL | 18-20 | 16-18 | 48-50 | 45-48" | 36-39" |
Sleepwear Sizing
| Size | Bust (inches) | Waist (inches) | Hip (inches) | UK | US |
|---|---|---|---|---|---|
| XS | 31-33" | 24-26" | 33-35" | 6-8 | 0-2 |
| S | 33-35" | 26-28" | 35-37" | 8-10 | 2-4 |
| M | 35-37" | 28-30" | 37-39" | 12 | 6-8 |
| L | 37-40" | 30-33" | 39-42" | 14-16 | 10-12 |
| XL | 40-43" | 33-36" | 42-45" | 18 | 14-16 |
| XXL | 43-46" | 36-39" | 45-48" | 20-22 | 18-20 |
International Conversions
| Lumière | UK | US | France | Italy | Australia |
|---|---|---|---|---|---|
| XS | 6 | 2 | 34 | 38 | 6 |
| S | 8-10 | 4-6 | 36-38 | 40-42 | 8-10 |
| M | 12 | 8 | 40 | 44 | 12 |
| L | 14 | 10 | 42 | 46 | 14 |
| XL | 16 | 12-14 | 44-46 | 48-50 | 16 |
| XXL | 18 | 16 | 48 | 52 | 18 |
Use a Soft Tape
Always measure with a flexible, soft measuring tape for accurate results. Avoid using rigid rulers.
Measure Regularly
Your size can change. We recommend re-measuring every 6 months or after significant weight changes.
When in Doubt, Size Up
If you're between two sizes, we recommend choosing the larger size for the most comfortable fit.