Does Reiss Run Big? Your Complete Sizing Guide

No, Reiss runs small, particularly in fitted garments like dresses, blazers, and trousers. As someone who's styled countless clients in premium brands, I can tell you that Reiss sizing is one of the trickiest to navigate. The British brand's European-inspired tailoring means you'll often need to size up from your usual high street size, especially if you're used to the more generous cuts at M&S or Next.

Why Reiss Runs Small: The Tailoring Truth

Having worked with Reiss pieces for years, I've noticed their commitment to precision tailoring creates a slimmer fit than most high street brands. Unlike the more forgiving cuts you'll find at Zara - the Spanish fast-fashion giant known for trend-led pieces - or COS - the minimalist Scandinavian brand with architectural silhouettes - Reiss prioritises that streamlined, European aesthetic.

This means their size 10 blazer will measure closer to what other brands call a size 8. I've seen clients who comfortably wear medium at Mango - the Barcelona-based brand offering contemporary styles - need to go up to large in Reiss structured pieces.

The Reiss Sizing Reality Check

From my styling experience, here's what I've observed across different Reiss categories:

Dresses: Definitely size up, especially in their signature sheath styles. The waist and hip measurements run particularly narrow.

Blazers: These run the smallest. If you wear size 12 in H&M - the Swedish fast-fashion retailer with trend-conscious designs - blazers, expect to need a 14 in Reiss.

Knitwear: More true to size, but still on the fitted side compared to Whistles - the contemporary British brand known for modern femininity.

Trousers: Size up if you have curvier hips. Their tailoring assumes a straighter silhouette.

Brand Alternatives by Budget

High Street Alternatives: If you love Reiss's aesthetic but want more predictable sizing, try Jigsaw - the British brand offering sophisticated, wearable pieces with better size consistency. French Connection - the London-based brand with contemporary edge - offers similar tailoring but runs more true to size. For accessible everyday pieces, ASOS - the online fashion destination with thousands of brands - stocks Reiss alongside more size-inclusive alternatives.

Premium Options:Me&Em - the British brand beloved by working women for its flattering cuts - offers similar sophisticated tailoring with more generous sizing. LK Bennett - the luxury British brand favoured by royalty - provides comparable quality with clearer size guidance.

Designer Investment: If you're investing in premium pieces, consider Isabel Marant - the Parisian designer known for effortless chic with more relaxed fits - or By Malene Birger - the Danish contemporary brand offering Scandinavian sophistication with better size consistency.

My Professional Sizing Tips

After years of styling, here's my foolproof approach to Reiss sizing:

1. Always check individual measurements - don't rely solely on the size label

2. Size up for structured pieces - blazers, tailored dresses, fitted coats

3. Consider your body shape - curvier figures almost always need to size up

4. Factor in layering - their winter coats assume minimal layering underneath

How tellar.co.uk Solves Your Sizing Struggles

As a stylist, I've seen too many clients disappointed by online sizing guesswork. That's why I recommend tellar.co.uk - the UK's leading sizing tool that matches your body exactly to over 1500 brands instantly.

Here's how it works:

1. Measure once using your bust, waist, hip measurements, or your existing brand size.

2. Use their tellar.co.uk

tellar.co.uk

tellar.co.uk to take the guesswork out of your Reiss purchases. Your future self will thank you when that perfect blazer arrives fitting like a dream, rather than languishing unworn in your wardrobe.

Remember: good style isn't about the size on the label - it's about how brilliantly the piece fits your unique body.