Side-by-Side Comparison
Clothing Sizes
Bra Sizes vs. Women's Clothing
Comparing 2 standards across 13 specifications. 13 key differences identified.
Comparing:
Bra Sizes
Women's Clothing
Bra sizing standardizes dual-dimensional breast support combining underbust Band Size (30 to 44) with Cup Volume (AA to H). Cup size is calculated directly from the difference between overbust fullest circumference and snug underbust ribcage measurement, cross-mapped across US, UK, EU, French (FR), and Italian (IT) systems.
Women's international clothing sizing matrix cross-references standardized garment sizes across the United States (US 0–20), United Kingdom & Australia (UK 4–24), Continental Europe (EU 32–52), Italy (IT 36–56), and Japan (JP 3–23) with body measurements.
Specification Comparison Table
13 Parameters| Parameter / Spec | ||
|---|---|---|
|
Governing Standards
|
ISO 3635 / EN 13402-4 / BS 6183 | ASTM D5585 / EN 13402-3 / BS 3666 / JIS L 4005 |
|
Band Size Calculation
|
Snug underbust ribcage circumference (inches) rounded to nearest even number | — |
|
Cup Size Calculation
|
Fullest Overbust Measurement (in)–Band Size (in) = Cup Letter | — |
|
Cup Step Increment
|
1.0 inch (2.54 cm) difference per cup letter | — |
|
US Cup Scale
|
AA (<1"), A (1"), B (2"), C (3"), D (4"), DD/E (5"), DDD/F (6"), G (7"), H (8") | — |
|
Sister Sizing Rule
|
Cup volume stays equal if you go DOWN a band and UP a cup (e.g., 36B = 34C = 32D) | — |
|
International Band Baseline
|
US/UK 32 = EU 70 = FR 85 = IT 2 | US/UK 34 = EU 75 = FR 90 = IT 3 | — |
|
Standard Sizing Range
|
— | US 0 (XXS) to US 20 (3XL) |
|
US to UK Offset
|
— | UK Size = US Size + 4 (e.g., US 6 = UK 10) |
|
US to EU Offset
|
— | EU Size = US Size + 32 (e.g., US 6 = EU 38) |
|
US to Italy Offset
|
— | IT Size = US Size + 36 (e.g., US 6 = IT 42) |
|
US to Japan Formula
|
— | JP Size = (US Size × 2)–1 (e.g., US 6 = JP 11) |
|
Petite vs Tall Inseams
|
— | Petite (≤5'3" / 28" inseam) | Regular (5'4"–5'8" / 31") | Tall (≥5'9" / 34") |