Arch4 is redefining modern luxury with its ultra-soft cashmere and minimalist design ethos—but with premium materials and a niche sizing model, getting the perfect fit is essential before investing.

Whether you’re shopping for their cult-favourite roll-neck, boxy knitwear, or elevated loungewear, sizing confusion can cost time and money. That’s where Tellar.co.uk steps in—giving you real-time size recommendations for Arch4 and over 1,500 brands, using your actual body measurements.


Why Arch4 Sizing Can Be Difficult to Navigate

As a contemporary British label, Arch4 adopts a streamlined silhouette that leans toward oversized but tailored fits. Their minimalist pieces are designed to drape—but depending on your proportions, that same drape can look chic… or shapeless.

Common sizing issues shoppers report:

  • Boxy cuts that overwhelm petite frames

  • Dropped shoulders that sit too low on narrower builds

  • Cashmere trousers that run short or too relaxed

  • Non-standard XS/S/M/L labels without detailed measurements

Even within their small capsule range, fits vary subtly between styles. That’s why you should use your exact chest, waist, and hip measurements to match sizing—not your usual UK size guess.


How to Find Your Arch4 Size Instantly

At Tellar.co.uk, we help you get sizing clarity in seconds—so your cashmere investment pieces are a perfect fit the first time.

Here’s how:

  1. Visit Tellar.co.uk

  2. Create a free profile

  3. Enter your body measurements (in inches or cm)
    → No tape? Get one free here

  4. Instantly get your Arch4 size recommendations, with guidance on style-specific fit

  5. Compare Arch4 against 1,500+ other brands

Our platform uses real data, not vague size charts or brand marketing claims, to ensure every recommendation is tailored to you.


What to Buy from Arch4: The Pieces Worth Investing In

Arch4 is built around a carefully curated edit of high-quality essentials. If you’re shopping for the first time, these are the standout pieces our users rate highest for fit, quality, and longevity.

1. The Alexandra Sweater – Best Luxe Staple

Made from sustainably sourced cashmere, this boxy roll-neck is a bestseller. It runs relaxed in the body but fitted at the cuffs and neck. Best suited for those who prefer a slightly oversized look. If you’re petite, Tellar will usually recommend sizing down.

2. The Elgin Jogger – Best for Hourglass or Athletic Shapes

A favourite for elevated loungewear, the Elgin trouser is soft yet structured. Fit feedback suggests the waistband is snug while the legs are generous. Tellar bases its sizing on your waist-to-hip ratio to ensure the perfect balance.

3. The Padstow Tank – Best Base Layer

Designed to skim the body without clinging, this tank top runs true to size but can be short in length. Taller users may need to size up, depending on torso length. Tellar takes your proportions into account automatically.

4. The Belle Cashmere Coat – Best Statement Outerwear

This investment piece is sharply tailored. It fits true to size across the shoulders and bust but is not oversized like other Arch4 knits. If you’re broader across the chest or arms, Tellar may suggest sizing up.


How Arch4 Fits Compared to Other Brands

Curious how Arch4 stacks up against similar luxury labels? With a single Tellar profile, you can compare fit consistency across:

  • Joseph – often narrower shoulders, shorter body

  • Raey by Matches – more oversized than Arch4

  • The Row – similar minimalist tailoring, often runs larger

  • Vince – wider through shoulders, shorter sleeves

Tellar reveals how each brand compares to your true body dimensions, helping you invest wisely in high-end wardrobe staples.


Measuring for a Perfect Fit

Don’t rely on clothing tags or online reviews. Instead, use your real body stats for sizing clarity:

  • Bust – Fullest part of the chest

  • Waist – Narrowest point above the belly button

  • Hips – Widest part of your lower body

You can enter these into Tellar.co.uk manually—or we’ll post you a free tape measure to make it easy.

💡 Tellar uses your largest measurement to avoid tight fits and recommend the most comfortable silhouette for each piece.


Your Arch4 Size and Beyond

Once your Tellar profile is complete, you’ll be able to:

  • See your size in Arch4 and 1,500+ brands

  • Know if a piece runs small, large, or true

  • Avoid wasted money on returns

  • Make better wardrobe decisions long-term

Your saved profile is editable at any time, and works for both menswear and womenswear brands across the UK, US, and Europe.


Ready to Find Your Fit in Arch4?

Minimalist design deserves maximum precision. Don’t guess your size in £500+ cashmere—use Tellar’s data-driven recommendations to shop smarter.

🎯 Start Now – It’s Free & Easy
→ Enter your body measurements
→ Match your size in Arch4 and 1,500+ brands
→ Discover alternative brands that suit your style and shape


Follow Tellar for Luxury Fit Advice

Want to stay updated on new brand drops, luxury sizing trends, and exclusive tools?

Follow Tellar.co.uk for weekly insights:

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Final Thoughts

Arch4 is the kind of brand that deserves a place in every elevated wardrobe—but their pieces are only worth the investment if they truly fit your shape.

That’s where Tellar.co.uk makes the difference.

Skip the returns. Know your fit. Feel confident in every purchase.



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