Calvin Klein Bra Size Chart & Sizing
Two sizing worlds in one brand: numbered underwire bras and the alpha-sized bralettes the label is famous for.
Calvin Klein in numbers
Calvin Klein's logo-band bralettes are alpha-sized (XS–XL) and are the styles most people mean when they say 'CK bra'. The brand also sells numbered underwire and lightly lined bras in a narrow mainstream range. Knowing which world you are in is the sizing story.
Your measured size in Calvin Klein
How this is computed: your US size read straight onto the US label, then adjusted for how Calvin Klein typically grades: true bands, small cups. This brand sells many styles in alpha sizes (S/M/L or numeric athletic sizes) that fit the ribcage rather than the cup: the conversion below applies to its numbered bra-sized styles; for alpha styles use the brand grid and expect support to fall off above a C or D.
Where Calvin Klein sits on the size grid
Cups A–DD in numbered styles. Not every band–cup combination exists; the largest cups usually appear on mid-range bands only.
Best for:
- Alpha-sized bralettes for smaller cups
- Fashion basics
- Lightly lined t-shirt bras in mainstream sizes
Calvin Klein bra size chart (US sizing)
Open the interactive size chart →
Calvin Klein labels in United States notation. Rows are bands (US number, US equivalent in brackets); columns are cup letters as Calvin Klein writes them. Each cell links to that size's guide.
| Band | A | B | C | D | DD |
|---|---|---|---|---|---|
| 30 (US 30) | 30A | 30B | 30C | 30D | 30DD |
| 32 (US 32) | 32A | 32B | 32C | 32D | 32DD |
| 34 (US 34) | 34A | 34B | 34C | 34D | 34DD |
| 36 (US 36) | 36A | 36B | 36C | 36D | 36DD |
| 38 (US 38) | 38A | 38B | 38C | 38D | 38DD |
Coverage is approximate to the brand's core collections; the largest cups typically exist on mid-range bands only. US DDD is written DDD here.
Does Calvin Klein run small or big?
Calvin Klein bands run true to size across US bands 30–38: 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.
Calvin Klein cups grade small from A to DD: try your measured cup and one up, and read a floating gore as the cup, not the band.
Calvin Klein wires are average width for the US system. Straps: Standard.
What to try at Calvin Klein
| Line | Notes |
|---|---|
| Modern Cotton | alpha-sized bralettes, the signature |
| Perfectly Fit | numbered lightly lined and t-shirt bras |
| Sheer Marquisette | numbered lace |
| Invisibles | numbered and alpha contour |
| Shape | Try |
|---|---|
| Full on bottom | Perfectly Fit demi |
| Full on top | Modern Cotton bralette |
| Shallow | Invisibles |
| Projected | Perfectly Fit |
| Wide-set | Modern Cotton triangle |
Not sure of your shape? The fit guide explains the five shapes and how to recognize yours.
Calvin Klein vs other brands
Side-by-side sizing, fit and your size in both. All comparisons →
Similar brands, different fit
Young, unretouched, and one of the friendlier mall ranges: soft contour bras and bralettes, numbered and alpha.
Alpha-sized shapewear-adjacent bras and bralettes, plus a numbered underwire range: the sizing story is knowing which you're buying.
The most familiar bra label in America, and historically the most common source of a band-too-loose, cup-too-small size.
Calvin Klein sizing: answered
How do Calvin Klein bralette sizes work?
Modern Cotton bralettes are alpha (XS–XL) and fit the ribcage: XS ≈ 30–32 band, S ≈ 32–34, M ≈ 34–36, L ≈ 36–38, XL ≈ 38–40, with the cup barely a factor. Above a C or D on any band, support drops; use the numbered bras.
What sizing system does Calvin Klein use?
Calvin Klein sizes in United States (US) convention: bands 30–38 (numbered styles); XS–XL (bralettes), cups A–DD in numbered styles. US labels: a US 34C is a 34C here.
Does Calvin Klein run big or small?
Calvin Klein bands run true to size across US bands 30–38: start with your measured band on the loosest hook. Calvin Klein cups grade small from A to DD: try your measured cup and one up.
What is my size in Calvin Klein?
Start with your measured size, convert it to US 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 Calvin Klein best known for?
Modern Cotton: alpha-sized bralettes, the signature. Also: Perfectly Fit (numbered lightly lined and t-shirt bras); Sheer Marquisette (numbered lace).
Which Calvin Klein bra suits my shape?
Full on bottom: Perfectly Fit demi; Full on top: Modern Cotton bralette; Shallow: Invisibles; Projected: Perfectly Fit; Wide-set: Modern Cotton triangle.
Are Calvin Klein sizes the same as Aerie?
Same notation where the systems match, different fit. Calvin Klein: true band, small cup, average wire. Aerie: true band, true cup, average wire. Convert the label, then apply the fit notes.
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