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Brand Size Comparison Tool

Compare bra sizes across different brands side by side. See how your size translates between Victoria's Secret, ThirdLove, Panache, and 70+ other brands.

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Victoria's Secret30–40 core with select 42 in lounge styles
Calvin Klein30–40 with select 42/44 sizes
Bali32–44 with comfort stretch bands
Maidenform30–40 with select 42/44 sizes
Warner's32–44 with comfort stretch bands
Playtex34–48 with 4-hook leotard backs
Natori30–40 with demi and full coverage
ThirdLove30–48 including half-band increments
Aerie30–40 with bralette sizing XS–XXL
Adore Me30–46 spanning core, curve, and DD+ lines
Soma30–40 with select 42/44 sizes
LIVELY32–44 with comfort stretch bands
Savage X Fenty30–46 across core and curve
SKIMS30–44 equivalent (XS–4X conversions)
La Senza30–38 core sizing
Lane Bryant34–54 in Cacique assortment
La Vie en Rose30–38 core fashion range
Bare Necessities28–58 via multi-brand curation
Vanity Fair34–48 focus on smoothing bands
Olga34–48 extended plus coverage
→

Why Bra Sizes Vary Between Brands

If you've ever wondered why you wear a 34C in one brand and a 32D in another, you're not alone. Bra sizing is not standardized across the industry, and different brands use different measurement systems, fit models, and manufacturing processes that result in significant size variations.

Key factors that cause brand-to-brand variation:

  • Measurement Systems: US, UK, EU, and Asian sizing systems use different base calculations
  • Fit Models: Brands design around different body types and target demographics
  • Band Stretch: Some brands use stretchier materials, affecting how the band fits
  • Cup Shape: Shallow vs projected cup designs can make the same size feel different
  • Manufacturing Tolerances: Even within the same brand, sizes can vary by style

How to Use This Brand Comparison Tool

1. Select Brands

Choose up to 6 brands you want to compare. You can select brands you currently wear, brands you're considering trying, or competitors to see how they stack up.

2. Enter Your Size

Enter your known size in one brand, and our tool will calculate equivalent sizes across all selected brands based on their sizing characteristics.

3. Compare Results

Review the side-by-side comparison showing band feel, cup depth, size ranges, and recommendations for each brand.

Popular Brand Comparisons

Victoria's Secret vs ThirdLove

VS tends to run loose in the band while ThirdLove is true to size. VS offers sizes 30-40 band with AA-DDD cups, while ThirdLove extends to 48 band and H cup with unique half-cup sizes.

Read detailed comparison →

US vs UK Brands

UK brands like Panache, Freya, and Fantasie use a different cup progression (DD, E, F, FF, G, GG) compared to US brands. UK brands often offer more extended sizes and projection options.

UK to US size converter →

Tips for Shopping Across Brands

  • •Always check brand-specific size guides before ordering, as our conversions are starting points
  • •Order from retailers with free returns when trying a new brand for the first time
  • •Consider sister sizes if your exact size isn't available in a new brand
  • •Read customer reviews for specific style fit feedback