Does the Brand Lululemon Run Big or Small? What Is Their Sizing Like

Is Lululemon True to Size?

Lululemon is one of the most recognisable names in activewear globally. Known for high-performance fabrics, sculpted silhouettes, and premium design, it’s a go-to brand for gym-goers, yogis, runners, and athleisure lovers alike. But a question we hear often is: Does Lululemon run big or small?

The short answer: Lululemon generally runs small — especially in leggings, bras, and body-contouring styles. While some items offer more give due to stretch fabrics, the brand uses North American sizing that tends to be slimmer than UK high-street norms.

👉 Before you scroll further: Tellar.co.uk has already analysed every single brand’s size data, including Lululemon, and will match your measurements to the correct size in over 1,500 brands. You’ll get a free measuring tape, a one-time setup, and lifetime access to your perfect fit — always free to use, with no catches. You'll never need to check a size chart again.

Understanding Lululemon Sizing: Performance-Fit Explained

Lululemon uses a numerical sizing system for women (typically 0–20) and lettered sizing for men (XS–XXL). The sizing is designed for compression and sculpting — meaning pieces often feel smaller than expected, especially on first wear.

1. Women’s Leggings and Bottoms

This is Lululemon’s flagship category — think Align, Wunder Train, Fast & Free.

Compression styles (like Wunder Train): Run small — expect a tight fit
Soft styles (like Align): Feel truer to size but may still be snug at the waist
Sculpting and running leggings: Often fit tighter in the hips and thighs

💡 Most women size up one size from their usual UK high street size.

📏 Want to know whether you're a Lululemon size 8, 10, or 12?

👉 Tellar will match it perfectly for you

🔗 Related post: Why Activewear Brands Run Small

2. Sports Bras & Crop Tops

Supportive and designed to stay in place, Lululemon bras and tops are cut smaller than standard UK sizing — especially in the band.

High-support bras: Often tight under the bust, especially for fuller chests
Low-support bras: May fit more comfortably but can still run small in length
Longline tops: Tighter than they look in the product photos

✅ If you’re in between sizes or have a larger bust, Tellar will recommend whether to go up 1 or 2 sizes depending on support level.

3. Outerwear & Hoodies

Jackets and fleeces from Lululemon tend to fit closer to the body — not oversized like other athleisure brands.

Define jacket: Very tight fit (most size up)
Scuba hoodies: Slightly boxier but still small in the shoulders
Packable outerwear: Cut for layering but still runs snug

📦 Most outerwear is designed for a sleek silhouette, not baggy comfort.

👉 Use Tellar to find your perfect layering size

Men’s Lululemon Sizing: Tailored and Slim

Lululemon menswear is cut for movement and aesthetic. It runs slimmer than traditional UK gym wear, but slightly more relaxed than designer tailoring.

T-shirts: Slim through the arms and chest
Shorts: True to size, some with stretch panels
Joggers & trousers: May run short in inseam for taller frames

👕 For comparison, a man wearing a UK Medium in Nike or Gymshark might find a Lululemon M too snug — Tellar solves this by mapping your exact chest, waist, and leg length to the best size.

Lululemon vs Other Activewear Brands

Brand	Fit Style	Notes
Lululemon	Slim / compression	Runs small, especially in bottoms and bras
Sweaty Betty	Small	Similar to Lululemon in bras; leggings are stretchier
Gymshark	Small	Sizing varies by collection
Nike	True to small	Generally more relaxed in activewear fit
Alo Yoga	Fitted	Close match to Lululemon in sizing

🎯 Tellar.co.uk maps all of these brands to your profile in seconds — and adjusts for fabric stretch, garment type, and fit style.

Lululemon International Sizing: US vs UK

Lululemon uses US numerical sizes, which can create confusion for UK shoppers.

Lululemon size 4 = UK 8
Lululemon size 6 = UK 10
Lululemon size 8 = UK 12
Lululemon size 10 = UK 14

But the reality is — even these conversions vary depending on the product’s fabric and support level.

💡 Don’t rely on charts.

✅ Let Tellar calculate your precise size by measurement

🔗 Helpful read: UK, US & EU Size Conversion Guide

Why Lululemon Is Exactly Why You Need Tellar

With compression fits, variable stretch, and North American sizing — Lululemon is a brand where size charts simply don’t work. That’s where Tellar.co.uk comes in:

✅ We've analysed every Lululemon product category

✅ You enter your measurements once (and get a free tape)

✅ Tellar instantly tells you your size in leggings, bras, jackets, and more

✅ Over 1,500 brands matched to your profile

✅ Always free to use — no gimmicks, no upsells

🧠 Click here to get your exact Lululemon size

Other Tellar Sizing Guides You’ll Find Useful

🔗 Sweaty Betty Sizing Guide
🔗 Everlane Fit Guide
🔗 Why Activewear Brands Are So Inconsistent
🔗 How to Measure Yourself Accurately
🔗 The Truth About Vanity Sizing

Final Verdict: Does Lululemon Run Big or Small?

Lululemon runs small across most of its range, especially in women’s leggings, bras, and jackets. While the quality and fit are excellent, sizing up is often required — and guessing can lead to disappointment.

📏 That’s why Tellar.co.uk exists — to give you a precise match in seconds, across all Lululemon categories and 1,500+ brands.

✅ CTA: Find Your Lululemon Size Instantly

🎯 Say goodbye to returns and size guessing. Create your free Tellar profile and get your best-fitting size in Lululemon and all your other favourite brands.

🔗 Click here to get started – it’s free & easy

Does the Brand Lululemon Run Big or Small? What Is Their Sizing Like — and What’s Good to Buy?