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:
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Patchwork and reworked jeans
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Classic rigid denim styles (Plein High, Marcel, Lasso Jean)
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Ready-to-wear tops and outerwear
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Unwashed, raw denim and washed-out finishes
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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.
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The Lasso Jean and Plein High styles are cut oversized through the hips and thighs
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Waistbands can sit loose, especially in rigid denim with no stretch
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Vintage denim pieces may vary slightly in cut
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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:
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“The Lasso jeans are cool, but huge in the waist. I had to size down one full size.”
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“Love the quality, but I wish I’d checked the hip measurements first — they’re roomy!”
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“I’m normally a UK 10 and the 27 was too loose. Ended up exchanging for a 26.”
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“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:
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Enter your waist, hips, and inseam measurements
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Instantly see your best-fitting B Sides size
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Compare your fit in other brands like Re/Done, Levi’s, Agolde and more
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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:
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Waist – Where you want the waistband to sit (natural waist or low rise)
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Hips – Widest part of your lower body
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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
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