What Size Am I in ASOS? Your Ultimate Guide to ASOS Sizing
Author: Stylist and brand team at Tellar
Date: 2025
The Tellar Fashion Hub is the UK's Largest, 100% Free, Fully searchable, Fashion Library.
Filled with 4000+ Honest & Unbiased posts, written by our expert stylists.
No adverts, no sponsored posts, no subscriptions. We are 100% free to use.
We are paid by affiliates, but we never allow brands to influence our recommendations.
Honest, Unbiased, Accurate & Free.
What Size Am I in ASOS? Your Ultimate Guide to ASOS Sizing
Shop with confidence using Tellar.co.uk – the UK’s best free sizing tool for ASOS and 1,500+ brands
ASOS is one of the UK’s most popular online fashion destinations, offering everything from basics to designer collaborations. But with such a wide range of labels and house brands under one roof, it’s easy to wonder:
👉 What size should I get in ASOS?
👉 Do ASOS sizes run big or small?
At Tellar.co.uk, we help you find your perfect fit in ASOS based on your exact body measurements — so you can skip the returns and stop second-guessing.
Does ASOS Run Big or Small?
ASOS sizing can vary depending on the collection:
-
ASOS DESIGN (main range): Generally true to size, though some pieces may run large in oversized styles
-
ASOS Petite / Tall / Curve: Customised for body proportions – size remains consistent
-
Brands sold via ASOS (Nike, Pull & Bear, Weekday): Sizing will match those original brand standards
-
ASOS Maternity: Uses standard sizing with bump allowance
🔍 The issue? It’s not always obvious which size fits you best. That’s where Tellar.co.uk comes in.
Find Your ASOS Size Instantly
Tellar.co.uk uses your chest, waist, and hip measurements to calculate your exact ASOS size, including variations across product categories and ranges.
📏 Example:
If your measurements are:
-
Chest: 92cm
-
Waist: 74cm
-
Hips: 100cm
Tellar.co.uk might recommend a UK 12 in ASOS DESIGN, but possibly UK 10 in ASOS Tall depending on the garment’s cut.
Why ASOS Sizing Can Be Confusing
-
Massive brand variety: ASOS stocks 850+ labels, each with its own fit profile
-
Fit can differ by fabric and cut: Stretch, drape, and silhouette all affect sizing
-
Unisex and oversized styles: Can feel misleading if you expect a standard fit
-
Different size charts for different countries: US, EU, and UK conversions may vary
💡 Tellar.co.uk automatically adjusts for all of this – using real sizing data from ASOS garments to give you the most accurate match.
Size Comparison: ASOS vs Other Popular Brands
Brand |
Compared to ASOS |
Fit Difference |
|---|---|---|
Zara |
Runs smaller than ASOS |
You may size up in Zara |
H&M |
Similar, but more varied |
Some H&M lines run larger or smaller |
Mango |
Slightly smaller |
Mango cuts tend to be narrower at the hips |
Next |
Slightly larger |
You may size down at Next vs ASOS |
Why Use Tellar.co.uk for ASOS?
With Tellar, you get:
✅ Accurate size recommendations for ASOS and 1,500+ brands
✅ Unit selection in inches or centimetres
✅ A free printable measuring tape
✅ Real-time size conversion across regions (UK/EU/US)
✅ Access to your profile anytime — from desktop or mobile
📝 Create your free profile now
Final Tip: Use Tellar Before Your Next ASOS Order
Before you hit Add to Basket on ASOS, head to Tellar.co.uk and check your fit. We help thousands of UK shoppers save time, money, and frustration by making sure clothes fit first time — every time.
📦 Fewer returns.
🎯 Perfect fits.
🛒 More confident shopping.
Follow us for daily brand sizing insights:
🔗 Pinterest | Instagram | LinkedIn
🟨 TELLAR.CO.UK — Get the Right Size, in the Right Store, Every Time. Always Free.