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Brand comparison

Skims vs Calvin Klein

Two brands, two ways of grading a size. Here is how Skims and Calvin Klein differ in system, range and fit, and which one to choose for your shape and your problem.

US sizing · Mid-marketSkims
Alpha-sized shapewear-adjacent bras and bralettes, plus a numbered underwire range: the sizing story is knowing which you're buying.
Alpha XXS–4X on most bras; numbered 32–46 on underwire lines bands · Numbered lines A–H

Full Skims guide →

VS
US sizing · Mid-marketCalvin Klein
Two sizing worlds in one brand: numbered underwire bras and the alpha-sized bralettes the label is famous for.
30–38 (numbered styles); XS–XL (bralettes) bands · A–DD in numbered styles

Full Calvin Klein guide →

Quick answer

Skims or Calvin Klein, in short

Quick answer

Skims and Calvin Klein both label in US sizing. Skims runs true to size in the band and true in the cup with average wires; Calvin Klein runs true to size in the band, grades small in the cup, average wires. Range: Skims Alpha XXS–4X on most bras; numbered 32–46 on underwire lines / Numbered lines A–H; Calvin Klein 30–38 (numbered styles); XS–XL (bralettes) / A–DD in numbered styles. Convert your measured size into each and let fit decide.

Key differences· Sizing system: United States vs United States· Bands: Alpha XXS–4X on most bras; numbered 32–46 on underwire lines vs 30–38 (numbered styles); XS–XL (bralettes)· Cups: Numbered lines A–H vs A–DD in numbered styles· Band grading: true to size vs true to size· Cup grading: true vs grades small· Wire width: average vs average· Best known for: Fits Everybody vs Modern Cotton
Your size

Your measured size in both

Measured size US 34CMeasure →
Skims · US
34C

Calvin Klein · US
34C

Same body, two labels. Each result is your US size converted into the brand's system, then adjusted for how that brand grades. Same system, so the label matches: the fit adjustment is the difference.

Side by side

Skims vs Calvin Klein at a glance

SkimsCalvin Klein
Sizing systemUnited StatesUnited States
BandsAlpha XXS–4X on most bras; numbered 32–46 on underwire lines30–38 (numbered styles); XS–XL (bralettes)
CupsNumbered lines A–HA–DD in numbered styles
Band gradingtrue to sizetrue to size
Cup gradingtruegrades small
Wire widthaverageaverage
StrapsStandardStandard
Alpha sizesYes, some linesYes, some lines
TierMid-marketMid-market
OriginUSUS
Signature lineFits Everybody: alpha-sized stretch bralettes and trianglesModern Cotton: alpha-sized bralettes, the signature
By shape

Which to try for your breast shape

ShapeSkimsCalvin Klein
Full on bottomT-Shirt Bra demiPerfectly Fit demi
Full on topFits Everybody scoopModern Cotton bralette
ShallowFits Everybody triangleInvisibles
Projectednumbered t-shirt braPerfectly Fit
Wide-setFits Everybody plungeModern Cotton triangle

Not sure of your shape? Use the shape finder.

Verdict

Choose Skims or Calvin Klein?

Choose Skims if…
  • stretch bralettes and lounge
  • smoothing under clothes
Choose Calvin Klein if…
  • cups usually feel roomy on you elsewhere
  • alpha-sized bralettes for smaller cups
  • fashion basics

Both are right at the same measurement. The label differs by system and the fit by grading: start from your measured size, convert into each, and let the five fit checks decide.

Key lines

What each brand is known for

SkimsCalvin Klein
Line 1Fits Everybody: alpha-sized stretch bralettes and trianglesModern Cotton: alpha-sized bralettes, the signature
Line 2Cotton: alpha-sized soft brasPerfectly Fit: numbered lightly lined and t-shirt bras
Line 3Ultra Fine Mesh / T-Shirt Bra: numbered underwireSheer Marquisette: numbered lace
Line 4Weightless: numbered lightly linedInvisibles: numbered and alpha contour
Answered

Skims vs Calvin Klein: answered

Is Skims the same size as Calvin Klein?

Same notation (US), different grading. Skims: Bands run true to size: start with your measured band on the loosest hook. Calvin Klein: Bands run true to size: start with your measured band on the loosest hook.

Which runs smaller, Skims or Calvin Klein?

Skims. Cups grade true to the measured difference. Calvin Klein (Cups grade small) try your measured cup and one up.

Which is better for a large bust, Skims or Calvin Klein?

Skims runs to Numbered lines A–H on bands Alpha XXS–4X on most bras; numbered 32–46 on underwire lines; Calvin Klein to A–DD in numbered styles on 30–38 (numbered styles); XS–XL (bralettes). The one whose range covers your size (in its own system) and whose wire width suits your root.

Which is better for a small bust?

Whichever grades true or small at A–C: Skims cups true, Calvin Klein cups grades small. Small bands need the brand whose range starts lower: Alpha XXS vs 30.

Can I use my Skims size at Calvin Klein?

Convert first (same system, so the label carries), then adjust: Calvin Klein bands run true to size and cups grades small relative to true. The calculator above does both.

Do Skims and Calvin Klein fit the same breast shapes?

Not identically. Full on bottom: Skims T-Shirt Bra demi vs Calvin Klein Perfectly Fit demi; Full on top: Skims Fits Everybody scoop vs Calvin Klein Modern Cotton bralette; Shallow: Skims Fits Everybody triangle vs Calvin Klein Invisibles.

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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