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Does the Brand Boux Avenue Run Big or Small on Clothes Sizing?

Author: Stylist and brand team at Tellar

Date: 2025

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Boux Avenue has become a household name for lingerie, nightwear, and bodywear—combining affordability with a luxury boutique feel. Whether you're buying loungewear, a new bra, or summer swimwear, the brand offers flattering, feminine styles for all body types.

But the one question most shoppers ask before checking out is:

Does Boux Avenue run big or small on sizing?

This guide gives you the honest answer—based on garment analysis, customer feedback, and data from Tellar.co.uk, the UK’s free clothing sizing tool. You’ll also learn how to find your exact size across Boux Avenue and 1,500+ other brands, instantly and accurately.


Who Is Boux Avenue?

Founded in 2011, Boux Avenue blends chic design with inclusive sizing. Known for its elegant yet accessible lingerie, the brand offers:

  • Bras (in band sizes 28–44 and cups A–G)

  • Lingerie & bodysuits in UK 6–18

  • Nightwear from cosy pyjamas to satin chemises

  • Swimwear & activewear with supportive design details

  • Inclusive options like DD+ bralettes, shapewear, and maternity pieces

With boutiques across the UK and a strong online presence, Boux Avenue is a go-to for both everyday essentials and special occasion sets.


So, Does Boux Avenue Run Big or Small?

Based on customer reviews and analysis from Tellar.co.uk, here’s what we’ve learned:

Clothing Type

General Fit

Sizing Notes

Bras

True to Size

Band fits snug; cups accurate if measured correctly

Knickers & Bottoms

True to Slightly Small

Can feel snug at waist; minimal stretch in lace pieces

Nightwear & Pyjamas

Slightly Generous

Relaxed fit, especially in elasticated waists

Bodysuits & Lingerie

True to Small

Fit depends on torso length—can feel tight on longer bodies

Swimwear

Small in Cup Area

Size up if between sizes or fuller bust

Summary:

Boux Avenue runs true to size in most categories—but bras and lingerie require accurate measurements, and fitted bodysuits or swimwear may run slightly small depending on body proportions.


Why Bra Sizing Feels Inconsistent

Even if you think you know your bra size, Boux Avenue—like many brands—uses tailored cup-to-band ratios that require proper measurement. Many returns come down to:

  • Band too tight or too loose

  • Cups not fitting breast shape (shallow vs full)

  • Wearing wrong size due to outdated measurements

Tellar’s system helps you get this right the first time by mapping your real measurements to the brand’s actual sizing data.


How Tellar.co.uk Helps You Get the Perfect Fit

With Tellar.co.uk, you no longer have to guess your size in Boux Avenue (or any brand). It uses your actual body data—chest, waist, hips—to instantly return your correct size in seconds.

Here’s how it works:

  1. 👉 Visit https://www.tellar.co.uk/create-profile/

  2. 📏 Enter your bust, waist, and hips (in CM or Inches)

  3. 🎯 Instantly see your best-fitting size in Boux Avenue

  4. ♻️ Reuse your profile for over 1,500 fashion brands

  5. 💌 Not sure of your measurements? Tellar sends you a free tape measure by post

It’s free

One-time quick set-up

Access your size anywhere, anytime

No subscriptions, no hidden costs


Real-World Tellar Sizing Example for Boux Avenue

User Profile:

  • Bust: 90 cm

  • Waist: 74 cm

  • Hips: 100 cm

  • Height: 167 cm

  • Fit preference: Light compression, supportive top half

Product: Boux Avenue “Tasha” Lace Bodysuit

  • Label recommends: UK 10

  • Tellar recommendation: UK 12 – due to snug lace fabric and cup coverage

  • Result: Improved comfort, better bust fit without flattening

Product: Boux Avenue “Chloe” Pyjama Set

  • Label size: M

  • Tellar recommendation: Stay with M – elastic waistband and relaxed top cut suit proportions

You can get results like these by setting up your free profile in under two minutes:

👉 Get started here


Boux Avenue vs Other Lingerie Brands

How does Boux Avenue sizing compare to other well-known underwear and loungewear brands?

Brand

Sizing vs Boux Avenue

Notes

Victoria’s Secret

Smaller

Boux Avenue runs truer and less tight in cups

Ann Summers

Similar

Comparable band sizing, but Ann Summers cuts often lower on bust

Bravissimo

Larger cup offering

More size range, but tighter bands

H&M Lingerie

Smaller

Less accurate sizing, especially in wireless pieces

Skims

Runs small

Size up in most compression items

Explore all these brands on the Tellar Store Lookup page and compare sizes instantly.


Common Boux Avenue Fit Issues (and Fixes)

Based on reviews and Tellar’s return data:

  • Problem: “Bra straps dig in or slip.”

    Fix: Use Tellar’s bra size suggestion based on band-to-bust ratio

  • Problem: “Panty elastic cuts into hips.”

    Fix: Size up in fitted briefs or lace-heavy bottoms

  • Problem: “Bodysuit flattens bust.”

    Fix: Select based on bust/torso match—not just dress size

  • Problem: “Swimsuit feels tight on top.”

    Fix: Use cup measurement logic—not just size S/M/L


Why Tellar.co.uk Is the Smarter Way to Shop

💡 Tellar.co.uk is not a generalised fit tool—it’s tailored to your exact measurements and the specific garment types you’re shopping for. It works across:

  • Bras

  • Knickers

  • Bodysuits

  • Pyjamas

  • Loungewear

  • Swimwear

  • Activewear

…plus every major fashion category from coats to dresses, and from modestwear to menswear.


Final Verdict: Does Boux Avenue Run Big or Small?

Here’s your complete answer:

  • Bras run true to size—but rely on accurate bust/band measurement

  • Knickers and lingerie bottoms may run slightly small, especially in fitted lace

  • Bodysuits are structured—size up if you have a long torso

  • Nightwear is cut slightly generously for comfort

  • Swimwear often runs small in the bust—adjust accordingly

✅ Best solution? Use your exact body data with Tellar.co.uk.


Start Now – It’s Free & Easy

Stop second-guessing your Boux Avenue size.

Start shopping with confidence.

🔗 Create your Tellar profile now

🔍 Check your size in Boux Avenue

📏 Get a free tape measure sent to you

Tellar.co.uk – Find your size in 1,500+ brands real-time. It’s Free & Easy.


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