That brief hesitation before adding to cart is familiar to all of us: "Am I an S or an M? What does 80B mean, what's my size?" Different brands, different letters, plus international sizing, make lingerie sizing an unnecessarily confusing topic. Yet, a few measurements and a single chart can clear things up instantly.
In this guide, we'll explain the lingerie size chart from top to bottom: how to calculate bra size, the S-M-L equivalent for panty size, international conversions, and how to take your measurements correctly at home. Get your tape measure ready; in a few minutes, you'll know your exact size.
⚡ Quick Summary
- Bra size consists of two parts: band (number) + cup (letter).
- The cup is determined by the difference: bust measurement − underbust measurement.
- Panty size is determined by waist and hip measurements, corresponding to S-M-L.
- Fit varies by brand; always refer to the chart based on your measurements.
How to Calculate Bra Size?
Bra size isn't just one number; it's made up of two pieces of information. The first is the underbust band measurement, which is the circumference just below your breasts (like 80, 85, 90). The second is the cup, which is a letter (A, B, C...). Together, these give you your full size, such as "80B."
To find your cup size, you need two measurements: the circumference around the fullest part of your bust and the circumference directly under your bust. The difference between these two determines the cup. For example, if the difference is approximately 13 cm, your cup is B; if it's 15 cm, it's C. The underbust band is directly read from your underbust measurement.
| Bust − Underbust Difference | Cup |
|---|---|
| ~10-11 cm | A |
| ~12-13 cm | B |
| ~14-15 cm | C |
| ~16-17 cm | D |
| ~18-19 cm | DD / E |
💡 Tip: Take measurements in the morning, with a thin bra or nude; don't pull the tape measure too tight or let it sag. Leaning slightly forward when measuring your bust will give the most accurate cup result.
Panty Size Chart (S-M-L)
Panty sizing is simpler than bra sizing; it corresponds to letter sizes (S, M, L) based on your waist and hip measurements. Hip measurement is generally the decisive factor because the widest part of the panty sits on the hips.
| Size | Waist (cm) | Hip (cm) | Number Size |
|---|---|---|---|
| XS | 60-64 | 84-88 | 34-36 |
| S | 65-69 | 89-93 | 36-38 |
| M | 70-74 | 94-98 | 38-40 |
| L | 75-80 | 99-104 | 42-44 |
| XL | 81-87 | 105-111 | 44-46 |
If you're between two sizes, decide based on the fabric: for flexible and seamless models, choosing the smaller size usually fits more comfortably, while for stiff and less stretchy fabrics, opt for the larger size.
International Size Conversion
Different countries have different numbering systems; the same bra might be an 80B in Turkey but referred to by a different code in the UK. This comparison will be useful for international shopping or with international brands.
| Band (TR/EU) | UK | US | Letter Size |
|---|---|---|---|
| 75 | 34 | 34 | XS-S |
| 80 | 36 | 36 | S |
| 85 | 38 | 38 | M |
| 90 | 40 | 40 | L |
| 95 | 42 | 42 | XL |
Cup letters can also shift by country; especially for D-cup sizes and above, UK and US sizing differs. Therefore, when shopping internationally, it's safest to rely on your measurements in cm rather than letter sizes.
4 Steps to Take Accurate Measurements
For the charts to be useful, measurements must be taken correctly. Take a few minutes; you can easily do it yourself.
- Underbust measurement: Pass the tape measure horizontally just below your breasts. Don't tighten or loosen it; this number gives you your band size.
- Bust measurement: Pass the tape measure around the fullest part of your bust. The difference between this measurement and your underbust measurement determines your cup size.
- Waist measurement: Measure around the narrowest part of your waist, without sucking in your stomach.
- Hip measurement: Pass the tape measure horizontally around the widest part of your hips. This measurement is the main determinant of your panty size.
⚠️ Caution: Each brand's sizing is slightly different; being an M in one brand doesn't mean you'll be an M in all of them. Read the size chart based on your cm measurements, not by memorizing letters. If your measurement falls between two sizes, check the product description for notes like "slim/generous fit."
What to Do If Your Size Has Changed?
Size is not static; weight, menstrual cycle, pregnancy, and age change bust and hip measurements over time. Memorizing a size from years ago and buying the same one for new purchases is a common mistake. Taking measurements once a year, especially for bras, is the most practical way to stay in the correct size.
If your bra band rides up your back, the cups gape, or the underwire digs in, this is usually a sign of "wrong size," not "wrong brand." Taking your new measurements and referring back to the size chart resolves most comfort issues.
Frequently Asked Questions
How do I find my bra size using the lingerie size chart?
First, measure the circumference just below your bust; this gives you your band size. Then, measure around the fullest part of your bust. The difference between these two measurements determines the cup: approximately 13 cm for a B cup, 15 cm for a C cup. Combining them gives you your full size, such as 80B.
How is panty size S-M-L determined?
Panty size is determined by waist and hip measurements; hips are generally the main determinant. According to the size chart, someone with hips measuring 94-98 cm would be an M, while 99-104 cm would be an L. If you're between two sizes, choose the smaller size for stretchy fabric and the larger size for stiff fabric.
How is international size conversion done?
A TR/EU 80 band size corresponds to a UK and US 36; an 85 corresponds to a 38. However, cup letters can shift from country to country, especially for D-cups and above. Therefore, when shopping internationally, it's safest to rely on your measurements in cm rather than memorizing letter sizes.
Why does the same size fit differently across brands?
Each brand has slightly different patterns and fabric elasticity, so being an M in one brand doesn't mean you'll be an M in all of them. For the most accurate result, don't rely on memorized letters but rather on your cm measurements and the product's size chart; also consider any fit notes (e.g., "slim/generous fit").
Final Word
Although the lingerie size chart may seem confusing at first, it's actually just a matter of a few measurements and a single reference. Once you learn your own cm measurements, you'll find the correct size in seconds, no matter the brand, freeing you from the worry of "will it fit?"
If you've taken your measurements, you can explore models that will fit you perfectly by browsing the entire collection. The correct size is the first step towards comfort and a great silhouette.
