The M&S Size Chart, Interactive
M&S runs the broadest high-street chart in Britain (A to H (UK letters) on 28 to 46, with selected styles to K) and measures more of the UK than anyone, historically with the +4 method it has since retired.
Every M&S size: tap for conversions
Select styles reach K.
Your size at M&S
Same published math as the calculator (snug measure, no +4) then translated into M&S’s native notation and checked against the real chart above, which lights up your cell.
How M&S sizing reads
M&S’s chart reads band-then-cup on UK numbering, same band numbers as the US, but a different alphabet above D: E, F, FF, G, GG, H and onward, one honest letter at a time. A US DDD is a UK E; carry a US letter across unconverted and you're a size off before checkout.
How M&S runs
Full fit notes, style guidance and comparisons live on the M&S brand page.
Where this chart ends
Past H, the specialists (Panache, Fantasie) go deeper in the same letters. And if a symptom (riding band, gaping cup, poking wire) sent you size-hunting, the fix guides decode it before you spend anything.
M&S sizing: answered
Does M&S run true to size?
Band: Bands run true to size: start with your measured band on the loosest hook. Cup: Cups grade true to the measured difference. In one line: grading runs true to measurement: start exactly at your measured size.
What sizing system does M&S use?
Native UK sizing (it reads band-then-cup on UK numbering) same band numbers as the US, but a different alphabet above D: E, F, FF, G, GG, H and onward, one honest letter at a time. A US DDD is a UK E; carry a US letter across unconverted and you're a size off before checkout. The interactive chart above shows every size with its US, UK, EU and FR equivalents.
What sizes does M&S carry?
28–46 bands with A–H cups in UK notation. 110 sizes in the core chart. Select styles reach K.
What if M&S doesn't make my size?
Past H, the specialists (Panache, Fantasie) go deeper in the same letters. Sister sizes (same volume, different band) sometimes bridge a one-band gap: the calculator above tries them automatically before giving up.
Opens HauteFlair’s own hub page; use your measured size there. HauteFlair is owned by the same company as Brasize.ai; that relationship never changes the sizing math, charts, or fit advice on this page. How this site makes money.
Start from the measured size
Two measurements, no inches added, sister sizes attached.
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