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Best Brands for Office-Ready Dresses

Author: Stylist and brand team at Tellar

Date: 2025

Honest. Unbiased. Independent. Free. We promise.

We will never be influenced by brands - just the perfect Fit, Size & Style for you. Search thousands of honest posts for free, written by our stylists - your own personal shopper.

An honest & impartial post, we wont be influenced by brands.

When dressing for a professional environment, quality, comfort, and fit matter. Here’s a look at several top brands celebrated for stylish, office-appropriate dresses:

1. Reiss

  • Known for sharp tailoring and elevated fabrics like crepe and silk blends.

  • Typically tailored and sleek—ideal for interviews and boardrooms.

2. COS

  • Offers minimalist designs with structured silhouettes.

  • Tailored fits that balance modern aesthetics with professional polish.

3. Whistles

  • Feminine yet refined: shift and wrap dresses in high-quality fabrics.

  • Suits office wear while transitioning seamlessly to evening events.

4. Phase Eight

  • Polished and understated prints with defined cuts.

  • Mix of stretchy and structured styles that fit multiple body shapes.

5. Hobbs

  • Tailored workwear staples, often with classic patterns and structured shoulders.

  • Durable fabrics ensure longevity in professional settings.

6. Jigsaw

  • Elevated basics: crisp shirtdresses, midi-length knit dresses.

  • Timeless and versatile for day-to-day office life.

7. Marks & Spencer (Autograph/Per Una)

  • Affordable yet professional: classic sheath, wrap, and jersey dresses.

  • Broad size range with accessible price points.

Fit & Fabric Facts: What to Look For

To ensure your office-ready dress works hard, always consider:

  • Fabric weight & stretch: Heavier fabrics (crepe, ponte, structured cotton) hold shape and prevent cling. Stretch content allows comfort without sacrificing structure.

  • Length: Knee-length or midi dresses are workplace friendly and flattering across heights.

  • Neckline: V-necks, modest boats, or classic crew necks are best; avoid anything too low or revealing.

  • Sleeve style: Three-quarter or full-length sleeves are versatile and polished; sleeveless can work under a blazer.

  • Colour & print: Solid neutrals (navy, black, camel) and subtle patterns project professionalism. Bolder prints should remain understated.

Why Fit Matters & the Role of Sizing Tools

You might assume a “size 10” fits everywhere—but sizes slip between brands. A dress that’s great in COS may be snug in Reiss. This creates return hassle, lost time, and online shopping stress.

Sizing tools simplify this. Instead of guesswork, they translate your figure into brand-specific sizes, making every office-ready dress a confident fit.

Introducing Tellar.co.uk – The UK's Leading Free Sizing Tool

Tellar.co.uk matches your real body measurements to fit data across over 1,500 brands—including all those recommended above. No guesswork, no confusing charts—just precise fit recommendations in real time, and it’s completely free

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🔧 How It Works

  1. Free Measuring Tape

  2. Or Use a Known Size

  3. Instant Brand Matches

    • Get your personalized size for Reiss, Whistles, Reiss, Jigsaw, Office, and more—instantly. Tellar accounts for a brand’s sizing quirks: e.g., "COS runs small," "Whistles dresses are true-to-size," etc.

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Benefits You’ll Love

  • First-time fit: Reduced returns because you're wearing the right size immediately.

  • Save time & money: No need to order multiple sizes or endure return waits.

  • Eco-friendly: Lower carbon footprint with fewer returns and wasted packaging.

  • Confidence to explore new brands: Knowing your size allows effortless discovery and investment in quality pieces.

Tellar in Action: Office Dress Brands

• Reiss & COS

Tellar’s brand-specific data helps navigate their tailored cuts. For example, a UK 10 in Reiss could be a UK 12 in COS—Tellar shows you the precise offset

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• Whistles & Hobbs

Advice on stretch or bias cuts makes these dresses easy to add to cart confidently.

• M&S / Per Una

Tellar helps align their street-size labels with UK sizing, a game-changer at accessible prices.

Real-Life Example 🧵

Say you measure:

• Bust: 92 cm

• Waist: 74 cm

• Hips: 100 cm

Using Tellar’s Store Size Lookup, you might get:

  • Reiss: UK 10

  • COS: UK 12

  • Whistles: UK 10

  • M&S Per Una: UK 14

That data-driven insight eliminates returns and ensures professional polish from day one.

Explore More Sizing & Style Guides

Tellar’s blog is packed with brand-specific insights and fit advice:

Why Office-Ready Dressing + Tellar = Win

  1. Pick the right brand: Choose your preferred silhouette—wrap, shift, shirt-dress—based on office culture and style.

  2. Use Tellar for fit precision: No body guesses, just tailored confidence across brands.

  3. Enjoy versatile wear: A perfectly fitting dress looks great all day—from morning meetings to after-work drinks.

✔️ How to Get Started with Tellar.co.uk

  1. Print or request your free tape: Free Measuring Tape at Tellar

  2. Create your profile: Enter your measurements or a trusted brand size at Create Profile

  3. Use Store Size Lookup: Discover your correct size in Reiss, COS, Whistles, Hobbs, M&S—and 1,500+ more

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  4. Shop with confidence: Add office-ready dresses to cart, wearing the best-fitting size for your body, every time.

Stay Connected with Tellar

Follow for daily sizing hacks, new brand insights, and styling inspiration:

  • Instagram: @Tellarsizing

  • Twitter/X: @Tellar100

  • Facebook: Tellar Sizing

  • Pinterest: TellarUK

In Summary

  • The best office dresses come from brands like Reiss, COS, Whistles, Hobbs, Jigsaw, and Per Una.

  • Fit and fabric matter—structure, stretch, length, necklines, and sleeve styles all contribute to polished office-ready looks.

  • Tellar.co.uk eliminates size guesswork by mapping your body (or a trusted reference brand) to accurate size matches across your favourite labels—fast, free, and in real time.

  • It’s simple: Request your free tape, set up your profile, lookup sizes, and step into the office with confidence (and no return regret).

Get started today with Tellar.co.uk—and never guess your size again!

Stay stylish—and sized right—with Tellar.

Related Tellar Posts

Stay Connected with Tellar

Instagram: @Tellarsizing

Twitter/X: @Tellar100

Facebook: Tellar Sizing

Pinterest: TellarUK

Happy office styling—with the perfect fit, every time.

Best Brands for Office-Ready Dresses