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Boux Avenue Bra Size Chart & Sizing

Fashion high-street lingerie in mainstream UK sizes with in-store fitting.

At a glance

Boux Avenue in numbers

Native sizing
UK · United Kingdom
Convert your US size into UK notation before ordering; the calculator below does it.
Band range · shown on the US band scale
28303234363840424446
30–40 (UK numbering)
Cup range · UK letters
ABCDDDEFFFGGGH
A–G
OriginUK
Founded2011
TierValue-to-mid
Alpha sizesNo

Boux Avenue is a UK high-street chain with fitting rooms and a fashion range. Sizes are mainstream UK; cups grade small on some plunge styles.

Your size

Your measured size in Boux Avenue

Measured size US 34CNot sure? Measure →
In Boux Avenue · UK sizing
34C
Band
Cup
Fit
Also try

Read the size guide →

How this is computed: your US size converted into UK notation, then adjusted for how Boux Avenue typically grades: true bands, small cups.

Range

Where Boux Avenue sits on the size grid

US band coverage (approx.)
283032343638404244

Cups A–G. Not every band–cup combination exists; the largest cups usually appear on mid-range bands only.

Best for:

  • Fashion lingerie at high-street prices
  • Plunge and balconette
  • In-store fitting for mainstream sizes
Size chart

Boux Avenue bra size chart (UK sizing)

Open the interactive size chart →

Boux Avenue labels in United Kingdom notation. Rows are bands (UK number, US equivalent in brackets); columns are cup letters as Boux Avenue writes them. Each cell links to that size's guide.

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.

Fit

Does Boux Avenue run small or big?

1Band

Boux Avenue bands run true to size across UK bands 30–40: 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.

2Cup

Boux Avenue cups grade small from A to G: try your measured cup and one up, and read a floating gore as the cup, not the band.

3Wire & straps

Boux Avenue wires are average width for the UK system. Straps: Standard.

Sizing quirks to know· Cups grade small on plunge· UK letters, to G· In-store fitting available
Lines and shapes

What to try at Boux Avenue

Key lineswhat each is for
LineNotes
Mollieplunge, the signature
Avabalconette
Everydayt-shirt
Nightwearlounge
By breast shapestart here
ShapeTry
Full on bottomAva balconette
Full on topEveryday full cup
ShallowMollie
ProjectedAva
Wide-setMollie plunge

Not sure of your shape? The fit guide explains the five shapes and how to recognize yours.

Head to head

Comparisons in Boux Avenue’s neighbourhood

Side-by-side sizing, fit and your size in both. All comparisons →

Answered

Boux Avenue sizing: answered

What sizing system does Boux Avenue use?

Boux Avenue sizes in United Kingdom (UK) convention: bands 30–40, cups A–G. Convert your US size into UK notation before ordering.

Does Boux Avenue run big or small?

Boux Avenue bands run true to size across UK bands 30–40: start with your measured band on the loosest hook. Boux Avenue cups grade small from A to G: try your measured cup and one up.

What is my size in Boux Avenue?

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. try your measured cup and one up. The calculator on this page does both.

What is Boux Avenue best known for?

Mollie: plunge, the signature. Also: Ava (balconette); Everyday (t-shirt).

Which Boux Avenue bra suits my shape?

Full on bottom: Ava balconette; Full on top: Everyday full cup; Shallow: Mollie; Projected: Ava; Wide-set: Mollie plunge.

Are Boux Avenue sizes the same as Marks & Spencer?

Same notation where the systems match, different fit. Boux Avenue: true band, small cup, average wire. Marks & Spencer: true band, true cup, average wire. Convert the label, then apply the fit notes.

Brand notes reviewed by the Brasize.ai fit team
BasisBrand size charts and typical grading; independent of the brandRangesCore collections: individual styles varyUpdatedJune 2026

Brasize.ai does not sell bras and is not affiliated with this brand. Report a correction via the editorial policy.

Shop itAt HauteFlair, our sister retailer

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.

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