Does the Brand B Sides Run Big or Small on Clothes Sizing?

B Sides is an emerging cult denim label that has taken the fashion world by storm with its vintage-inspired fits, patchworked craftsmanship, and artful take on Americana. Worn by tastemakers and stocked in fashion-forward boutiques, B Sides specialises in denim pieces that feel authentic, individual, and deliberately imperfect.

But there’s one thing that isn’t quite so charming:

Does B Sides run big or small?

This guide explores how B Sides jeans and ready-to-wear clothing fit, what UK shoppers are experiencing, and how to take the guesswork out of sizing with Tellar.co.uk — the UK’s most accurate free sizing tool.

What Is B Sides Known For?

Founded by Claire Lampert and Stacy Daily, B Sides began by upcycling vintage denim into one-of-a-kind pieces. Today, their collections include:

Patchwork and reworked jeans
Classic rigid denim styles (Plein High, Marcel, Lasso Jean)
Ready-to-wear tops and outerwear
Unwashed, raw denim and washed-out finishes
Made-in-USA and Japanese denim mills

The brand intentionally preserves the unique characteristics of denim — irregularities, asymmetry, and fading — which makes sizing all the more important. What feels like a great “vintage look” can easily turn into the wrong fit if you don’t get the size right.

General Fit: Does B Sides Run Big or Small?

Based on Tellar.co.uk’s aggregated user data and fit reviews:

B Sides tends to run large — especially in jeans.

The Lasso Jean and Plein High styles are cut oversized through the hips and thighs
Waistbands can sit loose, especially in rigid denim with no stretch
Vintage denim pieces may vary slightly in cut
Tops and jackets tend to run true to size, with a relaxed, slightly boxy shape

This oversized, slouchy fit is part of B Sides’ aesthetic. But for many shoppers — especially those used to slim-fit high-street denim — it can feel unfamiliar or too roomy without sizing guidance.

What UK Shoppers Say About B Sides Sizing

Tellar.co.uk collects fit feedback from UK users shopping global brands. Here’s what shoppers report when buying B Sides:

“The Lasso jeans are cool, but huge in the waist. I had to size down one full size.”
“Love the quality, but I wish I’d checked the hip measurements first — they’re roomy!”
“I’m normally a UK 10 and the 27 was too loose. Ended up exchanging for a 26.”
“The denim is very rigid — it doesn’t stretch to your shape.”

Key takeaway: B Sides jeans are meant to be oversized, but you may need to size down — especially at the waist.

B Sides Size Conversion Chart (UK to US Denim)

B Sides typically uses US denim sizing, which can lead to confusion for UK shoppers. Here's a rough conversion guide:

UK Size	US Size (B Sides Label)	Waist (inches)
UK 6	24	24"–25"
UK 8	25	25"–26"
UK 10	26	26"–27"
UK 12	27	27"–28"
UK 14	28	28"–29"
UK 16	29–30	29"–30"

Important: Due to the rigid denim and relaxed cut, many shoppers find they need to size down one size from their usual jeans — unless they prefer a very slouchy look.

Common Fit Issues With B Sides (and How to Fix Them)

Problem	Why It Happens	Tellar.co.uk Fix
Waistband gapes or sits too low	Oversized denim cut, especially in Lasso	Suggests smaller waist size based on actual measurement
Thighs or hips too baggy	Intentional volume in silhouette	Recommends size based on hip-to-waist ratio
Unsure which US size to pick	UK-to-US conversion not always clear	Automatically converts to best fit in UK
Rigid denim doesn’t stretch to fit	No elastane or stretch fibres	Factors material type into size recommendation

Skip the Sizing Guesswork: Use Tellar.co.uk

Finding the right fit in vintage-style denim is hard enough. That’s why Tellar.co.uk was built — to help UK shoppers find their ideal size in brands like B Sides.

Here’s how it works:

Go to Tellar.co.uk/create-profile
Enter your waist, hips, and inseam measurements
Instantly see your best-fitting B Sides size
Compare your fit in other brands like Re/Done, Levi’s, Agolde and more
Adjust units (cm or inches) depending on preference

✔️ 100% free

✔️ Works across 1,500+ brands

✔️ One-time setup

✔️ Compatible on mobile and desktop

✔️ We’ll send you a free tape measure when you join

B Sides vs Other Denim Brands

Brand	Compared to B Sides
Levi’s 501s	B Sides fits looser and higher rise
Agolde	B Sides has less stretch, runs larger
Re/Done	Re/Done fits closer to true size
Rag & Bone	More modern tailoring, less relaxed
Weekday	B Sides is boxier and higher quality

If you regularly wear any of these, Tellar will help you compare directly to B Sides sizing in real time:

👉 https://www.tellar.co.uk/store-size-lookup/

How to Measure for the Perfect B Sides Fit

For rigid denim, accurate measurements are everything. Focus on:

Waist – Where you want the waistband to sit (natural waist or low rise)
Hips – Widest part of your lower body
Inseam – From crotch to ankle bone (for cropped vs full length)

Need help? Use Tellar’s full how-to-measure guide, or receive a free tape measure when you set up your account.

Final Verdict: Does B Sides Run Big or Small?

In most cases, B Sides runs large — especially in denim. If you're buying the Lasso or Plein High styles, expect extra room in the hips, thighs, and waistband.

However, that’s part of the brand’s charm — a relaxed, broken-in fit that feels timeless and artistic.

To ensure the right balance of structure and slouch, use Tellar.co.uk to enter your measurements and get the perfect recommendation — before you spend over £200 on your next pair.

Get Your B Sides Size Instantly

✅ Create your profile here

✅ Enter your measurements once

✅ View your B Sides size immediately

✅ Compare your fit in over 1,500 brands

✅ Get a free tape measure by post

Find your size in 1,500+ brands real-time. It’s free & easy.

Stay Connected with Tellar

For more brand fit guides and sizing tips, follow us:

How to Measure Yourself Properly for Denim
Rigid vs Stretch Denim: What You Need to Know
Agolde Sizing Guide
Tellar’s Store Size Lookup Tool