Why Are Sizes Different in Every Brand? A Guide to Comparing Clothing Sizes Across Brands

Struggling to find your size in every store? You’re not alone. One brand’s "medium" might be another’s "large" – and the frustration is real. That’s why we built Tellar.co.uk – the UK’s leading sizing tool that helps you find your perfect fit in over 1,500 brands using your own body measurements.

In this guide, we break down why sizes vary so much, how to compare between brands, and how Tellar.co.uk solves the problem once and for all.

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🔍 Why Do Clothing Sizes Vary Across Brands?

1. There’s No Universal Sizing Standard

Every brand creates its own size charts based on its target demographic, design choices, and market trends. For example:

• Zara may cut slimmer for a European silhouette.

• ASOS might size up slightly for a broader UK audience.

• H&M sizes often come up smaller, especially in fitted items.

This means a size 10 in one store might fit like a size 8 or 12 in another.

2. “Vanity Sizing” Makes It Worse

Some brands deliberately label larger clothes with smaller sizes to flatter their customers – a tactic known as vanity sizing. While it may boost confidence in-store, it causes havoc when shopping online.

3. Fabric, Fit, and Style Play a Role

A loose-fit linen shirt and a tailored bodycon dress in the same size will fit very differently – even from the same brand. When switching between brands, the cut, elasticity, and purpose of the item all impact sizing.

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📏 How to Compare Clothing Sizes Between Brands

1. Start With Your Actual Body Measurements

Before comparing brands, make sure you know your:

• Chest/Bust

• Waist

• Hips

Use a soft measuring tape or print your free Tellar.co.uk tape here and measure snugly but not tightly.

2. Use a Size Comparison Tool (That’s Us!)

Head to Tellar.co.uk and enter your measurements. Our tool instantly shows your real-time size in over 1,500 brands – including high street names like:

• Zara

• H&M

• ASOS

• M&S

• Net-a-Porter

You can even compare how different brands fit you specifically.

3. Compare the Size Charts (But Carefully)

Most brands publish their own size charts, but they vary in detail. Some show measurements in inches, others in cm. Some offer garment sizing (clothes laid flat), while others show body sizing.

Tip: Stick to body measurement charts – these align better with your own numbers and how the garment will actually fit.

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🧪 Real Example: Zara vs ASOS Sizing

Let’s compare:

As you can see, ASOS runs slightly larger than Zara. Without Tellar.co.uk, you'd have to guess your size – but our platform makes it effortless.

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👗 Why It Matters

Wrong size = returns, refunds, and frustration. In fact:

• 52% of online clothing returns are due to poor fit.

• Most shoppers reorder in multiple sizes, costing time and money.

• A poor fit can ruin the experience – even if you love the style.

Tellar.co.uk helps eliminate all that by mapping your measurements to the exact brand sizes in real time.

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✅ How Tellar.co.uk Works

1. Go to https://tellar.co.uk

2. Enter your chest, waist, and hip measurements

3. Select your preferred unit (CM or Inches)

4. Instantly see your recommended size in over 1,500 stores

No more guessing. No more returns. Just your perfect fit – for free.

Or if you already know your size in one store (e.g. “M in Zara”), you can create a profile using that, and we’ll calculate your measurements based on that size.

➡️ Try it here

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✨ Bonus: Track and Save Your Sizes

Once logged in, Tellar saves your data so you can:

• Search any brand

• Get instant size matches

• Access your profile on mobile or web

• Update measurements any time

Your privacy is secure, and the tool is 100% free.

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🎯 Final Thoughts: Know Your Size, Shop With Confidence

The fashion world may be inconsistent, but your sizing doesn’t have to be.

Stop relying on generic charts. Use Tellar.co.uk to find your perfect fit every time.

Whether you shop at Zara, ASOS, COS, or & Other Stories – we’ve got you covered across every style, every store, every time.

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🛍️ Call to Action

➡️ Visit Tellar.co.uk now

➡️ Print your free measuring tape

➡️ Check your size in 1500+ brands

➡️ Create your free profile