Why does my bra size change between brands?

Brands use different fit models, grade their patterns differently, and target different body shapes. A 34DD from a US brand may fit differently from a 34DD in a UK brand because the cup progression and band construction vary.

Is UK sizing different from US sizing?

Yes. UK and US sizes are the same for bands and cups up to DD, but UK uses E, F, FF, G, GG while US uses DDD, G, H, I, J. Always check which system a brand uses before ordering.

What brand runs the largest in cups?

UK brands like Panache, Freya, and Elomi tend to run truest to size with deeper cups. US brands like Victoria Secret often run shallower in cups, so you may need to size up the cup letter while keeping the same band.

How do I find my size in a new brand without trying on?

Use our brand size lookup tool to compare your known size across brands. Also check brand-specific size charts, read reviews from customers with similar measurements, and look for bras with free returns so you can exchange if needed.

I'm a 34DD in One Brand — What Am I in Others? Cross-Brand Bra Size Guide

←

May 13, 2026•10 •

Sarah Mitchell

: May 2026

You May Also Like

Victoria's Secret vs ThirdLove Sizing | Brand Comparison Guide

Sister Bra Sizes Explained: Find Your Perfect Alternative Size

International Bra Size Conversion Guide