M&S Bra Size Chart & Fitting Guide
Britain's biggest bra fitter. UK sizing at scale, with in-store fitting in almost every large store.
Marks & Spencer in numbers
M&S sells more bras than anyone in the UK and offers free fitting in most stores. Its grading follows UK convention; its range spans everyday value to the Rosie and Autograph premium lines. Fittings are by eye and fit rather than tape.
Sub-brands and lines: Autograph, Rosie, Body.
Your measured size in Marks & Spencer
How this is computed: your US size converted into UK notation, then adjusted for how Marks & Spencer typically grades: true bands, true cups.
Where Marks & Spencer sits on the size grid
Cups A–H (some to K). Not every band–cup combination exists; the largest cups usually appear on mid-range bands only.
Best for:
- Accessible in-store fitting
- Value UK sizing in a wide grid
- Everyday and t-shirt
Marks & Spencer bra size chart (UK sizing)
Open the interactive size chart →
Marks & Spencer labels in United Kingdom notation. Rows are bands (UK number, US equivalent in brackets); columns are cup letters as Marks & Spencer writes them. Each cell links to that size's guide.
| Band | A | B | C | D | DD | E | F | FF | G | GG | H |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 28 (US 28) | 28A | 28B | 28C | 28D | 28DD | 28E | 28F | 28FF | 28G | 28GG | 28H |
| 30 (US 30) | 30A | 30B | 30C | 30D | 30DD | 30E | 30F | 30FF | 30G | 30GG | 30H |
| 32 (US 32) | 32A | 32B | 32C | 32D | 32DD | 32E | 32F | 32FF | 32G | 32GG | 32H |
| 34 (US 34) | 34A | 34B | 34C | 34D | 34DD | 34E | 34F | 34FF | 34G | 34GG | 34H |
| 36 (US 36) | 36A | 36B | 36C | 36D | 36DD | 36E | 36F | 36FF | 36G | 36GG | 36H |
| 38 (US 38) | 38A | 38B | 38C | 38D | 38DD | 38E | 38F | 38FF | 38G | 38GG | 38H |
| 40 (US 40) | 40A | 40B | 40C | 40D | 40DD | 40E | 40F | 40FF | 40G | 40GG | 40H |
| 42 (US 42) | 42A | 42B | 42C | 42D | 42DD | 42E | 42F | 42FF | 42G | 42GG | 42H |
| 44 (US 44) | 44A | 44B | 44C | 44D | 44DD | 44E | 44F | 44FF | 44G | 44GG | 44H |
Coverage is approximate to the brand's core collections; the largest cups typically exist on mid-range bands only. Convert US DDD → UK E before reading.
Does Marks & Spencer run small or big?
Marks & Spencer bands run true to size across UK bands 28–46: start with your measured band on the loosest hook, and expect it to feel snug for the first week if you are coming from an add-inches size.
Marks & Spencer cups grade true to the measured difference from A to H: a gap or overflow in the measured letter is a shape signal, so change the cut before the size.
Marks & Spencer wires are average width for the UK system. Straps: Standard.
What to try at Marks & Spencer
| Line | Notes |
|---|---|
| Body | smoothing and t-shirt |
| Rosie | lace and silk |
| Autograph | premium everyday |
| Flexifit | stretch-cup comfort |
| Shape | Try |
|---|---|
| Full on bottom | Rosie balconette |
| Full on top | Autograph full cup |
| Shallow | Body t-shirt |
| Projected | Rosie |
| Wide-set | Body plunge |
Not sure of your shape? The fit guide explains the five shapes and how to recognize yours.
Marks & Spencer vs other brands
Side-by-side sizing, fit and your size in both. All comparisons →
Similar brands, different fit
Marks & Spencer sizing: answered
How does M&S bra fitting work?
Free in most large stores, by eye and fit rather than tape; fitters typically start from your current bra and adjust. Check the result with the five fit checks: band level and snug on the loosest hook, cups full, gore flat, straps light, wire on the ribcage.
What sizing system does Marks & Spencer use?
Marks & Spencer sizes in United Kingdom (UK) convention: bands 28–46, cups A–H (some to K). Convert your US size into UK notation before ordering.
Does Marks & Spencer run big or small?
Marks & Spencer bands run true to size across UK bands 28–46: start with your measured band on the loosest hook. Marks & Spencer cups grade true to the measured difference from A to H.
What is my size in Marks & Spencer?
Start with your measured size, convert it to UK notation, then apply the brand's grading: start with your measured band on the loosest hook. The calculator on this page does both.
What is Marks & Spencer best known for?
Body: smoothing and t-shirt. Also: Rosie (lace and silk); Autograph (premium everyday).
Which Marks & Spencer bra suits my shape?
Full on bottom: Rosie balconette; Full on top: Autograph full cup; Shallow: Body t-shirt; Projected: Rosie; Wide-set: Body plunge.
Are Marks & Spencer sizes the same as Bravissimo?
Same notation where the systems match, different fit. Marks & Spencer: true band, true cup, average wire. Bravissimo: true band, true cup, average wire. Convert the label, then apply the fit notes.
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