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Longline blazers are the ultimate layering staple—elongating your frame, offering structure, and effortlessly elevating everything from jeans to tailored trousers. When choosing one, two things matter most: cut and fit. Here’s our rundown of top brands that nail both, plus how Tellar ensures you always pick the right size—no guessing, no gaps.
1. Reiss
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Why we love it: Sleek, architectural silhouettes with impeccable tailoring. Their longer length and structured shoulders create the perfect balance of bold and refined.
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Fit notes: Typically slim through the waist—size based on shoulder width. Dress it up with tailored trousers or layer over a jersey dress.
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Shop: Available via Reiss and UK retailers like MatchesFashion.
2. COS
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Why we love it: Minimalist, Scandinavian-chic with clean lines and high-quality fabrics. Ideal for a polished, minimalist wardrobe.
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Fit notes: Designed for a slightly oversized, boxier fit. Great for an effortlessly relaxed yet refined look.
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Shop: See the COS blazer collection.
3. & Other Stories
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Why we love it: Fashion-forward with contemporary tailoring—modern cuts, unexpected textures, and bold colour choices.
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Fit notes: Often cut roomier to accommodate layering. Size down if you prefer a more fitted silhouette.
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Shop: Browse the & Other Stories blazers.
4. Mango
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Why we love it: Stylish yet accessible. Mango manages the look of designer clarinet blazers at high-street prices.
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Fit notes: Generally true to size, but varies by style. Try details like asymmetrical lapels or belted waists.
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Shop: Check out the Mango blazer line.
5. Hobbs
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Why we love it: British elegance with a feminine edge—longline blazers in luxurious fabrics tuned for excellent cut and coordination.
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Fit notes: Sized to highlight the waist. If you’re between sizes, size up for layering ease.
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Shop: Find them at Hobbs.
Why Sizing Matters—And Where Tellar Comes In
Blazers are unforgiving—you’ll notice the wrong size at the shoulders, across the chest, or at the sleeve length. That’s why accurate sizing is essential, and why Tellar is here to help you get it right, every time.
🔍 About Tellar
Tellar is a free, independent sizing tool that covers clothing from 1,500+ major brands—including Reiss, COS, & Other Stories, Mango, and Hobbs
tellar.co.uk+2tellar.co.uk+2linkedin.com+2tellar.co.uk. Whether you're between sizes or shopping brands with inconsistent cuts, Tellar matches your bust, waist, and hip measurements to each brand's sizing charts.-
Completely free: No hidden fees, no trackers—even though some affiliate links may exist, Tellar remains honest and unbiased.
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Unbiased advice: With no paid bias, recommendations are based purely on size data.
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Library access: Articles and brand breakdowns (like “Reiss blazer fit explained”) are all freely available.
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Tools included: Printable measuring tape, how-to-fit guides—everything you need to confidently buy online.
👉 Explore Tellar’s sizing tool and tips here: Tellar.co.uk (works live!)
Using Tellar to Buy Your Perfect Blazer
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Enter your measurements (bust, waist, hip—metric or imperial).
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Select your target brand and style (e.g. Mango longline blazer).
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See your best-fit size—complete with notes like “Zara runs small in shoulders; size up here.”
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Click through to purchase with confidence.
Tellar also offers downloadable cheat-sheets and measuring guides to ensure your measurements are correct—no guesswork needed
linkedin.com+2tellar.co.uk+2tellar.co.uk+2.Styling Tips for Longline Blazers
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Think proportion: Balance the length of your blazer with slimmer bottoms—skinny jeans, tapered trousers, or tailored skirts.
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Add structure: A belted blazer cinches the waist, preventing a “boxy” silhouette.
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Layer smartly: Longer blazers work well with button-down shirts, light knits, or even turtlenecks.
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2025 trends: Rich tones like caramel, navy, and forest green are trending—perfect for autumn outerwear.
Shop Brands Section
Here’s a quick comparison grid to help you shop:
Brand |
Style Focus |
Price Range |
Where to Buy |
|---|---|---|---|
Reiss |
Tailored structure |
£200–£400 |
Reiss |
COS |
Minimalist, boxy |
£100–£200 |
COS |
& Other Stories |
Trend-forward |
£120–£250 |
& Other Stories |
Mango |
High-street polish | £80–£150 |
Mango |
Hobbs |
Elegant, luxe fabrics | £150–£300 |
Hobbs |
(All links tested and active.)
Tellar Resources & Styling Posts
For deeper dives into fit and style, check out these Tellar articles—fully accessible and live on site:
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The Best Sizing Calculators and Fit Tools for Clothing in 2025: A comprehensive guide to fit tools (including Tellar’s methodology)
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Find Your Correct Clothes Size in Every Brand: Brand-by-brand fit analysis (look for the blazer sections).
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Common Questions About Tellar.co.uk: Everything you need to know—privacy, how measurement matching works, and brand coverage
tellar.co.uk+2linkedin.com+2tellar.co.uk+2.
Why Tellar Stands Out
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Body-to-brand fit logic: No dependence on past purchase data or AI guesses—just measurement-driven matches
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Extensive brand coverage: Over 1,500 brands across UK, US, and EU markets—perfect for cross-shopping.
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Easy measurement tools: Printable measuring tape, helpful sizing guides, no app required.
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Free and independent: Letting you shop smartly and confidently with every blazer purchase.
Stay Connected with Tellar
Follow Tellar on social to stay in the size curve:
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Instagram: @Tellarsizing
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Twitter/X: @TellarSizing
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Facebook: Tellar Sizing
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Pinterest: TellarSizing
See daily style tips, sizing hacks, brand deep-dives, and more!
Final Word
A longline blazer is only as good as its fit—and Tellar makes sure that fit is spot-on, every time. By combining reliable measurement data with unbiased brand insights, Tellar empowers you to shop with confidence—no returns, no frustration.
Explore Tellar today, and make the perfect blazer your next fashion essential.
Download your free measuring tape, find your size, and transform how you shop blazers—only at Tellar.co.uk.
Stay stylish, stay sized right!