UK Brand Size Guide

UK Bra Brand
Size Guide

Not all UK brands size the same. This guide covers M&S, Bravissimo, ASOS, Primark, John Lewis and Next — with fit notes and UK/EU sizing explained for each.

UK bra retailer size range comparison — M&S, Bravissimo, ASOS, Primark and John Lewis band and cup ranges

Quick-reference band and cup ranges for the five biggest UK bra retailers. Full details and fitting notes for each brand are below.

UK Sizing vs EU Sizing — What You Need to Know

UK bra bands are measured in inches (e.g. 30, 32, 34) while European (EU) bra bands are measured in centimetres (e.g. 65, 70, 75). To convert: add 5 to the UK band to get the approximate EU band — for example, a UK 34 = roughly EU 75.

Cup letters are also different above a D cup. UK cups go AA, A, B, C, D, DD, E, F, FF, G...while EU cups go AA, A, B, C, D, E, F, G, H, I...

Quick conversion: UK 34DD = EU 75E — UK 34E = EU 75F — UK 34F = EU 75G

Brand-by-Brand Fitting Guide

Marks & Spencer (M&S)

Comfortable everyday bras, including full cup and minimiser styles

30–44 / AA–H

Fit Note

True to size — reliable for standard UK sizes

UK vs EU Sizing

M&S uses UK standard sizing throughout. Their EU-sold products may use EU labelling.

Buying Tips

M&S offers a free bra fitting service in most stores. Their 'Total Support' and 'Full Cup' ranges are particularly popular for sizes D and above. Returns are straightforward with a receipt.

+ Wide high-street availability+ Free fitting service+ Good return policy+ AA–H cup rangeView Full Guide

Bravissimo

UK's leading specialist for full bust (D–K cup) bras

28–40 / D–K

Fit Note

True to UK sizing — the go-to for accurate fitting in larger cups

UK vs EU Sizing

Bravissimo sizes are in UK standard. EU shoppers: add 5 to the band and shift the cup letter up — e.g. 34E UK = 75F EU.

Buying Tips

If you wear a D cup or above, Bravissimo is the best starting point in the UK. Every brand they stock is vetted for cup accuracy. Book a free fitting appointment — they are industry-leading.

+ D–K cup specialist+ Expert fitting appointments+ Large online range+ 28 band availableView Full Guide

ASOS

Fashion-led bras at affordable prices; large online range

30–40 / AA–GG

Fit Note

Own-brand tends to run slightly small in the cup — size up if between sizes

UK vs EU Sizing

ASOS own-brand uses UK sizing. Third-party brands on ASOS may use EU sizing — always check the individual product page.

Buying Tips

ASOS is a marketplace as well as a retailer, so sizing varies hugely by brand. Always read customer reviews for fit notes. Their returns are free and simple. Great for trying new styles.

+ Wide style choice+ Free returns+ Budget-friendly+ Sales and student discounts

Primark

Budget basics — ideal for everyday T-shirt bras

32–40 / A–E

Fit Note

Can run slightly small — try before you buy if possible

UK vs EU Sizing

Primark UK uses UK sizing. Their European stores use EU sizing — if shopping in Europe, add 5 to the band number.

Buying Tips

Primark is best for standard sizes (32B–38D). Their range is limited above a D or E cup. Very low prices make them good for basics, but in-store try-on is essential as sizing can be inconsistent.

+ Very affordable+ Good for basics+ No-fuss in-store shopping+ Regular new styles

John Lewis

Quality mid-to-premium bras — stocks Freya, Fantasie, Panache

30–44 / AA–J

Fit Note

True to size for UK brands; check individual brand guides for EU brands

UK vs EU Sizing

John Lewis stocks both UK-branded and European brands. Always check the brand tag — EU-labelled bras use cm bands and EU cups.

Buying Tips

John Lewis is one of the best places in the UK for quality bras. They offer free bra fitting in most stores. Stock includes both UK and EU-labelled brands — Freya, Fantasie, and Panache are UK-sized; others may use EU sizing.

+ Free in-store fitting+ Premium brands stocked+ 30-day returns+ Good customer service

Fashion-forward everyday bras and bralettes

30–44 / A–F

Fit Note

Own-brand is true to UK size — good consistency

UK vs EU Sizing

Next uses UK sizing online and in-store in the UK. Their EU website and stores use EU sizing.

Buying Tips

Next is a reliable mid-range option for standard sizes. Good for everyday bras and fashion bralettes. Limited selection above an E or F cup. Their website clearly indicates sizes in UK inches.

+ Good value for money+ Consistent sizing+ Bralette range+ Easy online orderingView Full Guide

Quick Comparison Table

UK bra brand comparison table — band range, cup range, fit note and EU sizing
Brand	Band Range	Cup Range	Fit Note
M&S	30–44	AA–H	True to size
Bravissimo	28–40	D–K	True to size
ASOS	30–40	AA–GG	Slightly small cup
Primark	32–40	A–E	Can run small
John Lewis	30–44	AA–J	True to size
Next	30–44	A–F	True to size