Guide to Converting US EU UK Lingerie Sizes

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Shopping for lingerie online? You're not alone. But let's be real — nothing's more frustrating than falling in love with a lace bralette only to realize it's sized in EU or UK standards. Cue the confusion. One woman’s 34B is another’s 75B or even a 12B. Sound familiar? Don’t sweat it. We’ve got your back (and your bust) with this no-nonsense guide to converting US, EU, and UK lingerie sizes.

Why Lingerie Sizing Is So Confusing

Here’s the tea: lingerie sizing isn’t universal. The US, UK, and EU all use different systems based on band and cup measurements — but they don’t always align. Even worse? Brands within the same country can vary slightly due to vanity sizing or design cuts.

The good news? Once you know your underbust (band) size in centimeters and your cup size logic, conversions become way easier.

How Bra Sizing Works Around the World

  • US & UK: Use inches. Band size is measured around your ribcage (just under the bust), then rounded to the nearest even number. Cup size is determined by the difference between bust and underbust.
  • EU: Uses centimeters. The band number is your actual underbust measurement in cm (e.g., 70 = 70cm). Cup sizes follow alphabetically (A, B, C…).

Quick fact: A US 34 band equals roughly 86 cm — so it converts to EU 85. Yep, it’s that precise.

Lingerie Size Conversion Table

US Band UK Band EU Band Underbust (cm)
30 28 70 70–74 cm
32 30 75 75–79 cm
34 32 85 80–84 cm
36 34 90 85–89 cm
38 36 95 90–94 cm

Cup Size Consistency?

Good news: cup letters are mostly consistent across US, UK, and EU — but the starting band changes how it fits. For example, a D cup on a 32 band is smaller in volume than a D on a 36. That’s why sister sizing (e.g., 34C = 36B) matters if you need a tighter band or looser fit.

Pro Tips for Accurate Sizing

  1. Measure Yourself: Wrap a soft tape around your ribcage, just under the bust. That number (in inches or cm) is your starting point.
  2. Check Brand Charts: Always refer to the brand’s specific size guide — especially for European labels like Ewa Michalak or Panache.
  3. Embrace Sister Sizes: If 34D feels loose, try 32DD or 36C for better support.

Remember: a well-fitted bra should feel snug but not painful, with no spillage or gaping.

The Bottom Line

Converting lingerie sizes doesn’t have to be a mystery. With this guide and a quick measurement, you can shop confidently across borders. Whether you’re eyeing French luxury from Louisa Bracq or rocking UK-based Fantasie, knowing your EU 75B equals a US 34B makes all the difference.

So go ahead — treat yourself to that dream set. Now you know exactly what fits.