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What Size Am I in COS? Find the Right Fit with Tellar.co.uk
Minimalist, architectural, and often oversized — get your perfect COS fit first time with Tellar.co.uk.

COS, part of the H&M Group, is renowned for its clean silhouettes, premium fabrics, and elevated basics. But many shoppers still ask:

👉 Does COS run big or small?
👉 Should I size down in COS?
👉 How does COS sizing compare to Zara or H&M?

At Tellar.co.uk, we help you cut through the sizing confusion. Enter your chest, waist, and hips, and we’ll show you your ideal COS size, matched to over 1,500 brands using real garment data — not generic charts.

Does COS Run Small or Large?

COS is known for minimalist cuts and intentionally oversized fits. However, sizing still varies based on category and fabric.

🔹 General fit guide:

  • Tops & Dresses: Often intentionally oversized — some customers prefer to size down for a closer fit

  • Trousers & Skirts: True to size, with a structured waist; may feel snug without stretch

  • Tailoring (blazers, coats): Designed for boxy silhouettes, often cut large

  • Menswear: Relaxed, minimalist cuts — true to size, but generous in width

🧭 Tellar.co.uk adjusts automatically for COS’s style and fit

Real Example: COS Sizing Conversion

If your measurements are:

  • Chest: 90cm

  • Waist: 74cm

  • Hips: 100cm

You may be a UK 10 in most brands.
In COS:

  • For a standard oversized blouse or dress, Tellar.co.uk may recommend a UK 8

  • For fitted trousers, you’d likely wear a UK 10 or 12 depending on the waistband structure and rise

📏 Get your exact COS size instantly

COS vs Other Brands: Fit Comparison

Brand Compared to COS Fit Notes
Zara COS runs larger COS favours looser cuts and longer lengths
H&M COS is more structured Both are part of the same group, but COS is upscale
Arket Very similar Arket and COS share fabric and fit philosophies
M&S COS is more fashion-forward M&S is more classic in shape and sizing
& Other Stories COS is more oversized & Other Stories uses more feminine tailoring

🔍 Compare COS to 1,500+ brands with our tool

Why COS Sizing Can Be Hard to Judge

  • Oversized pieces vary by garment — a size S could feel like a UK 12–14

  • Structured tailoring may fit more closely at the waist or shoulders

  • Fabric weight (wool, linen, cotton twill) affects drape and perceived size

  • Men’s relaxed cuts may feel baggy unless styled deliberately

💡 That’s why Tellar.co.uk uses real data to guide you to the right size — based on fit, style, and body measurements.

🧵 Create your free sizing profile to get accurate recommendations for COS and all your favourite brands.

Why Use Tellar.co.uk for COS?

✅ Converts COS’s size guidance into personalised UK sizing
✅ Works in cm or inches
✅ Supports menswear and womenswear
✅ Includes a free printable measuring tape
✅ Adjusts for oversized, tailored, and structured fits
✅ 100% free — no sign-up needed

🛍️ Find your COS size in seconds

Follow Tellar.co.uk for Fit Advice, Brand Insights & Sizing Tips

🟨 Tellar.co.uk — Minimal Effort, Maximum Fit. Find Your COS Size Instantly.