Best High‑Street Formalwear Brands: Stylish, Smart, and Size-Perfect

Author: Tellar.co.uk Stylist TeamDate: July 10, 2025

Formalwear has moved into the everyday—but elevating any outfit only happens when the fit is flawless. That’s where Tellar.co.uk comes in, matching your real body measurements to 1,500+ brands. Here’s our top picks for formalwear, complete with sizing advice and live Tellar links.

🔹 Women’s Formalwear Picks

1. Reiss – Tailored EleganceReiss offers sharp blazers and sophisticated dresses—but don’t let slim-fit tricks on you. Many styles run snug, so sizing up is common.🔗 Explore fit notes and sizing tips in our Reiss feature: Reiss Clothing: What to 2. & Other Stories – Minimalist PolishFor clean cuts with feminine tailoring. These pieces generally fit true to size but occasionally run narrow over the bust or hips.🔗 Discover accuracy in our guide: & Other Stories fit & sizing at Tellar

3. Mango – Euro Tailoring for LessMango’s “Selection” suiting is sleek—just watch for narrow fits across the hip.🔗 Find your fit in Mango with: How to Find Your Size in Mango at Tellar

4. COS – Architectural StyleKnown for elevated minimal pieces with a modern edge. Generous sizing makes COS great for taller frames.🔗 See our full analysis: COS sizing at Tellar

5. Hobbs – Refined British TailoringClassic cuts—perfect for occasionwear. Just be aware of size variation between dresses and jackets.🔗 Get match-ready: Hobbs sizing guide at Tellar

🔹 Men’s Formalwear Picks

1. M&S Autograph – Everyday SharpenedReliable cuts in slim, regular, and tailored fits—great value for formal staples.🔗 Compare M&S to Next sizing here: [M&S vs Next size comparison at Tellar]

2. Charles Tyrwhitt – Crisp ClassicsExceptionally sized dress shirts and workwear with a polished fit.🔗 Learn your size: Charles Tyrwhitt sizing guide at Tellar

3. Next – Accessible & InclusiveWith short/regular/long options, Next is size-friendly.🔗 Check your size: [What Size Am I in Next? at Tellar]

4. Moss – Occasion SpecialistsFormerly Moss Bros; now offers suits with rental and mix-and-match options.🔗 Match your size: Moss sizing guide at Tellar

5. River Island – Trendy/Formal CrossoverEdgy cuts in suiting—but shoulders often run small.🔗 Fit found here: River Island sizing insights at Tellar

Style Picks by Occasion

Job Interview

• Women: Reiss tailored dress or & Other Stories blazer + trousers

• Men: M&S Autograph navy suit with CT crisp white shirt

Smart Work Capsule

• 2 Blazers (neutral + statement)

• 2 Trousers (slim + relaxed)

• 3 Shirts or pairs of faculty

• 1 standout dress or coordinated set

Wedding Guest

• Women: COS elegant midi or Reiss satin dress

• Men: Moss slim wool suit or CT navy 3-piece

Tailoring & Fit Hacks

1. Shoulders first—only perfect off-the-rack reference is here.

2. Easy tweaks: hems/waistbands are inexpensive.

3. Size shifts: don’t upsize more than two sizes or you'll distort proportions.

4. Prefer no alterations? Let Tellar.co.uk find your size first—01.

Why Fit > Brand

A high-street piece that fits is always elegant. With Tellar’s data-mapped sizing, you'll avoid returns and get perfect fits from high-street and designer labels alike.

📌 Learn how it works and start building your size profile for free here: Create your Tellar profile

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