Bra Size Chart

Interactive bra size chart with international sizing systems. View, filter, and convert bra sizes across US, UK, EU, FR, IT, AU, and JP systems.

Sizing System
Unit
Band Range: 28 – 48
2848
2848
Filter cup sizes...
Highlight Your Size

Bra Size Chart

Band \ CupAAABCDDDDDDGHIJK
28AAABCDDDDDDGHIJK
30AAABCDDDDDDGHIJK
32AAABCDDDDDDGHIJK
34AAABCDDDDDDGHIJK
36AAABCDDDDDDGHIJK
38AAABCDDDDDDGHIJK
40AAABCDDDDDDGHIJK
42AAABCDDDDDDGHIJK
44AAABCDDDDDDGHIJK
46AAABCDDDDDDGHIJK
48AAABCDDDDDDGHIJK

Band Size Distribution

Cup Size Distribution

Understanding Bra Size Charts

What Is a Bra Size Chart?

A bra size chart is a comprehensive reference table that maps band sizes against cup sizes to create a complete grid of available bra sizes. These charts are essential tools for understanding how bra sizing works across different international systems and finding the right fit.

Why Bra Size Charts Matter

Studies show that up to 80% of women wear the wrong bra size. A comprehensive size chart helps you understand the full range of available sizes, compare different sizing systems used around the world, and identify your correct size more accurately.

International Sizing Systems

There are seven major bra sizing systems used worldwide: US (inches, even numbers 28-48), UK (same band numbering as US but different cup letters above D), EU (centimeters, multiples of 5 from 60-120), French/Belgian (EU band + 15), Italian (numbered 1-12), Australian/NZ (same as US/UK), and Japanese (centimeters like EU, 60-100).

How to Read a Bra Size Chart

Band sizes run vertically (rows) and cup sizes run horizontally (columns). Each cell represents one complete bra size — for example, the intersection of band 34 and cup C gives you size 34C. Smaller sizes appear in the upper-left, progressing to larger sizes toward the lower-right.

What Is a Bra Size Chart?

A bra size chart is a comprehensive reference grid that maps band sizes against cup sizes to show every possible bra size combination. Unlike simple size calculators, a chart lets you see the entire sizing landscape at a glance, helping you understand where your size falls in relation to others and identify potential alternative sizes (sister sizes) that might fit better.

Our interactive bra size chart goes beyond static tables found on retailer websites. You can filter by sizing system (US, UK, EU, FR, IT, AU, JP), adjust the visible band and cup ranges, search for specific sizes, and click any cell to see that size converted across all seven international systems. The chart is color-coded to show the size spectrum from smallest (lighter) to largest (darker).

How to Read a Bra Size Chart

The chart is organized as a grid with band sizes on the vertical axis and cup sizes on the horizontal axis. Each cell represents one complete bra size (band + cup). To find your size, locate your band size in the left column and trace across to your cup letter column. The intersecting cell is your size. You can also use the chart to find your sister sizes: move one cell right and one row up (smaller band, larger cup) or one cell left and one row down (larger band, smaller cup) — all cells along these diagonals have the same cup volume.

US/UK Bra Size Chart Range

The US and UK systems share the same band range: 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, and 48 inches. These correspond to approximately 90% of women's measurements. Cup sizes range from AA (smallest) through A, B, C, D, DD/E, DDD/F, G, H, I, J, K and beyond. The most commonly purchased sizes in the US are 34B, 34C, 36B, and 36C, though studies suggest many of these women would be better fitted in smaller bands with larger cups (e.g., 32DD instead of 34C).

European and French Size Charts

The European system uses centimeters for the band, ranging from 60 to 120 in increments of 5. The French system is simply EU + 15, so a EU 75 becomes FR 90. Both use the same cup letter progression as the EU system: AA, A, B, C, D, E, F, G, H, I, J, K — with no double letters after D. When reading an EU chart, multiply inches by 2.5 to find your band (34 inches = 85 cm ≈ EU 85). For the French chart, add 15 to the EU band (EU 85 = FR 100).

Italian, Australian and Japanese Size Charts

Italy uses a numerical band system where 1 = 32 inches, 2 = 34, 3 = 36, and so on. The cup letters follow the EU progression. Australia and New Zealand use identical sizing to the UK system for bras — same band in inches, same cup letters. Japan uses centimeter-based bands like the EU (60, 65, 70, 75, 80, 85) but starts cups at A with no AA option, and typically offers a more limited range (bands 60-85, cups A-I).

Using the Chart for Fitting

The bra size chart is most useful as a fitting tool when combined with sister size knowledge. If a bra fits in the cups but is loose in the band, look one row up and one column right on the chart — that's your sister size with a tighter band. If the band is good but cups are too small, stay in the same row but move one column right. The chart makes these relationships visual and intuitive, helping you navigate between sizes without guesswork.

Practical Example

Example: Finding Your Size on the Chart

Suppose your measurements suggest you need a 34C in the US system. Here is how to use the interactive chart:

Step 1 — Select your sizing system: Click the US button at the top. The grid will display US band sizes (28-48) and US cup letters (AA through K).

Step 2 — Adjust the band range: Use the band range sliders to focus on relevant sizes. For 34C, set the range to 30-38.

Step 3 — Highlight your size: Type 34C in the highlight field. Your size will glow with a golden ring.

Step 4 — See conversions: Click the 34C cell to see your size in all 7 international systems.

Frequently Asked Questions

How do bra sizes work?

A bra size consists of two parts: the band number and the cup letter. The band represents the measurement around your ribcage. The cup letter indicates the difference between your bust and band measurements, with each letter typically representing a 1-inch (2.54 cm) increment.

Why do bra sizes differ between countries?

Different countries developed their own sizing standards independently. The US and UK use inches for bands, while the EU and Japan use centimeters. Cup letter progressions also differ — what the US calls DD and DDD, the UK calls DD and E, and the EU calls E and F.

What is the most common bra size?

The most commonly worn bra sizes are around 34C to 36C in US sizing, though this varies by region. The band size distribution chart above shows the relative frequency of different band sizes.

How do I convert my bra size to another system?

Click any cell in the interactive chart above to see that size converted to all 7 international systems instantly. For a quick reference: US 34 = UK 34 = EU 75 = FR 90 = IT 3 = AU 34 = JP 75.

Can I trust online bra size charts for buying bras?

Bra size charts provide an excellent starting point, but actual fit varies between brands, styles, and materials. Use the chart to identify your general size range, then consult brand-specific size guides.

Disclaimer: This bra size chart is provided for informational purposes only. Sizing varies between brands, manufacturers, and styles. The conversion formulas represent standard industry practice but may not match every brand exactly. For the best fit, consult a professional bra fitter and brand-specific size guides.

Sources & References

  1. ASTM D6791 — Standard Tables of Body Measurements — (astm.org)
  2. EN 13402 — Size Designation of Clothes — European Committee for Standardization
  3. International Bra Size Chart — bratabase.com
  4. Bra Sizing Standards — International Textile and Apparel Association

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