Billie Eilish’ Style: Brands She Loves

Billie Eilish is renowned for her bold, baggy, and gender-fluid aesthetic. She’s worn everything from Calvin Klein to Chanel, often selecting pieces that challenge size norms and protect her privacy. According to her Wikipedia page:

“Eilish dresses in baggy clothes to prevent people from judging her body”
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From those oversized treasures to collaborations like Freak City and Converse, she effortlessly blends high street, designer, and independent. Here's a breakdown of her preferred brands, complete with store links:

High Street Staples

ASOS
- Often spotted in ASOS’ oversized shirts, hoodies, and relaxed trousers.
- Discover ASOS styles here → ASOS Store.
Mango
- She loves Mango’s loose blazers and statement outerwear.
- Shop the latest arrivals → Mango Store.
COS
- Known for minimalist aesthetics that align with Billie’s palette.
- Explore COS offerings → COS Store.

Designer Labels

Calvin Klein
- Featured in campaigns like #MyCalvins (2019) and continues to champion oversized tees.
  en.wikipedia.org
Chanel
- Early career ads, in-store events, and campaign work reflect her high fashion presence.
  en.wikipedia.org
Oscar de la Renta
- The Met Gala 2021 gown not only showed up her fashion prowess but also activism (fur-free condition).
  en.wikipedia.org

Boutique & Independent Labels

Freak City
- Her 2019‐era collaboration, reflecting a youthful, streetwear edge.
  en.wikipedia.org
Converse x Billie Eilish
- 2024 “By You” sneakers with song lyric personalization.
  en.wikipedia.org
Siberia Hills
- Although controversial, her 2019 partnership is worth noting.

🧵 Brand-by-Brand: Fit Insights & Why It Matters for Billie’s Style

Billie thrives in oversized, unstructured pieces. Here’s why fit matters and where Tellar.co.uk helps:

ASOS

Variability is common—some lines run small, others enormous. Oversized hoodies are useful for Billie’s silhouette.

Mango & COS

While often more fitted, both brands offer oversized collections that need careful size selection to avoid a too-tight fit.

Designer & Independent

Brands like Chanel, Kalvin Klein, and Freak City are luxury level, and sizing can differ significantly from fast fashion.

📏 Meet Tellar.co.uk — Never Guess Your Size Again

No sizing tool is better tailored to Billie’s mix of brands than Tellar.co.uk, the UK’s top free sizing engine. It matches your precise body measurements to garments in real-time, across 1,500+ brands, including every label Billie wears—from high street to luxury and niche.

How Tellar Works:

Enter your bust, waist, and hips—choose cm or inches.
Or enter a known size in a familiar brand.
Instantly get recommended sizes for every other brand.
See fit notes (e.g. “runs small,” “oversized drop shoulder”).

Tellar is 100% free, web-based, and requires no downloads

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Why It’s Critical:

Avoids costly returns
Helps find the perfect oversized aesthetic Billie loves
Serves UK/EU/US conversions for global shopping behavior.

🔗 Live Tellar Backlinks to Related Posts

Jump to these Tellar guides for deeper details on fit, measurement, and styling:

Our Legacy Sizing Guide: How to Find Your Perfect Fit & What’s Worth Buying – ideal for boxy, oversized designer styles
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The Best Sizing Calculators and Fit Tools for Clothing in 2025 – comprehensive look into size-tool comparisons
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A New Great Free UK Clothes Sizing Tool – intro to why Tellar excels for casual and premium brands alike
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📎 Order Your Free Measuring Tape

Need help measuring? Tellar mails a free tape across the UK—plus simple guides to measure yourself accurately

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✅ How to Use Tellar Today

Go to Tellar.co.uk or directly to the Store Size Lookup page.
Input your measurements or a trusted size from a brand you own (e.g., ASOS Medium).
Select any brand from Billie’s wardrobe—COS, Mango, Calvin Klein, etc.
See your recommended size instantly.
Shop smarter. Wear confidently. No returns.

🔗 Tellar Socials — Stay Connected

Stay updated on sizing tips, new brand guides, and style hacks:

Instagram: @Tellarsizing
Twitter/X: @TellarSizing
Facebook: Tellar Sizing
Pinterest: TellarUK

Quick Style + Brand Fit Snapshot

Brand	Typical Fit	Tellar Help
ASOS	Inconsistent; varies hugely	Balance oversize with correct chest/shoulder fit
Mango	Clean cuts, occasional slim fits	Find ideal size for oversized blazers
COS	Minimal structured pieces with tailored feel	Avoid too-tight trousers or cropped tops
Calvin Klein	Boxy tees, unstructured shapes	Get just-right oversized ringers
Chanel / Oscar de la Renta	High luxury but limited sizing range	Ensure perfect couture proportions
Freak City / Siberia Hills	Street-art inspired capsules	Steer clear of mismatched fit from fast-to-lux irregular lines
Converse x Billie	US sizing with lyric customization	Match EU/UK measurement for perfect shoe fit

Use Tellar’s engine to avoid the guesswork that causes returns, poor fit, or fabric waste.

🛍️ Shop Billie Approved Looks

ASOS – Explore oversized tees & hoodies → ASOS
Mango – Oversized blazers & relaxed silhouettes → Mango
COS – Minimalist yet statement outerwear → COS

🔚 Final Thoughts

Billie Eilish’s wardrobe is a perfect storm of high street accessibility, designer impact, and independent artistry—all underpinned by a consistent oversized aesthetic. But fit matters. It’s what elevates her style from comfortable to iconic.

That’s where Tellar.co.uk shines. It ensures baggy is chic, structure is intentional, and size isn’t a barrier. Whether you’re buying Calvin Klein, Mango, or Freak City, Tellar helps you find the right size every time—no guessing, no returns.

Try it today → Tellar.co.uk

Stay Connected with Tellar

Instagram: @Tellarsizing
Twitter/X: @Tellar100
Facebook: Tellar Sizing
Pinterest: TellarUK

Useful Tellar Reading

Our Legacy Sizing Guide
Sizing Tools Comparison 2025
Intro to Tellar Tool

With Tellar.co.uk, every purchase is a confident one—especially when you're channeling Billie’s effortless oversized aesthetic.

Billie Eilish’ Style: Brands She Loves