Speedo Size Guide: How to Find Your Perfect Fit and What’s Worth Buying

Speedo is synonymous with performance swimwear, dominating the global market with over 100 years of innovation. Whether you’re training, racing, or relaxing poolside, choosing the right Speedo size is critical. Tight fits, stretch fabrics, and water resistance all affect how their products feel—and sizing errors are common, especially when shopping online.

At tellar.co.uk, we take the guesswork out of swimwear sizing. Our free, personalised tool recommends your perfect Speedo size based on your body measurements—or a brand you already own. This post explains how to find your best fit and which Speedo products are actually worth investing in.

Why Speedo Sizing Matters More Than You Think

Swimwear fits differently from everyday clothing. Speedo uses high-compression materials like Endurance+ and PowerFlex, designed to feel snug on land and perfect in the water. But that means a UK 12 in high-street brands won’t feel the same in a Speedo swimsuit.

Key fit challenges with Speedo include:

Tight chest panels that restrict bust movement
High-cut leg openings that rise differently on varying body shapes
Men’s jammers and briefs that compress the thighs more than expected

You might think you know your size—but Speedo’s cuts require precise measurements for performance, comfort, and style. That’s why tellar.co.uk is your essential swim partner.

How to Get Your Ideal Speedo Fit

Step 1: Take Accurate Body Measurements

Use a soft measuring tape and measure the following:

Chest (at the fullest point)
Waist (narrowest part of your torso)
Hips (widest part of your bottom)

Not sure how? Follow our guide:

👉 How to Measure Yourself

Need a measuring tape?

🎁 Get one for free from Tellar

Step 2: Create a Free Size Profile on Tellar.co.uk

Once you’ve taken your measurements, create your account here:

👉 /create-profile/

You’ll instantly see your recommended size for Speedo and over 1,500 other brands, whether you’re shopping for swim briefs, body suits, or full-length racing skins.

Already own something that fits well (like from Nike Swim or Adidas)? You can use that to build your profile too.

🔐 Log in or register instantly

How Speedo Sizes Compare to Other Brands

Speedo sizing is based on body length and compression, not just bust or waist. Here's how they stack up compared to standard UK sizing:

Item Type	Speedo Sizing Advice	Compared to UK High Street
Women’s One-Piece	Size up if between sizes	Feels tighter than brands like H&M or ASOS
Men’s Jammers	Stay true to size if lean, size up for muscular thighs	Runs tighter than Calvin Klein or Arket
Swim Briefs	True fit but high compression	Snugger than Nike or Puma
Kids Swimwear	Age labels run small	Consider the next size up

Want an instant recommendation tailored to your body?

💡 tellar.co.uk

Which Speedo Products Are Worth Buying?

Speedo’s range spans from affordable leisurewear to elite racing gear. Here's what we recommend based on value, durability, and style:

1. Fastskin LZR Pure Intent Kneeskin

Elite compression and bonded seams—engineered for racers. Fits tight but delivers unmatched speed in water. Make sure you use body-length as well as bust measurements for this fit.

2. Endurance+ Medalist Swimsuit

One of the most durable suits on the market. Great for regular pool swimmers. Expect a tighter dry fit that loosens slightly in water.

3. Boomstar Splice Muscleback

A flattering cut for training or beach. Sits higher on the thigh and supports the bust more than fashion swimwear.

4. Men’s Eco Endurance+ Jammer

A training classic made from recycled yarns. Mid-compression and chlorine-resistant. True to size if you prefer a secure fit.

5. Speedo Essentials

Includes all-round basics for men, women, and kids. Great entry-level products, but sizing can run small—so check your Tellar recommendation before purchasing.

Why Tellar.co.uk Works So Well for Speedo

Tellar.co.uk has helped thousands of UK shoppers find their correct fit across categories where size really matters—like denim, tailoring, and swimwear. Our Speedo fit data is based on:

Actual user measurements
Comparison with 1,500+ brands
Feedback on compression vs leisure fit

Plus, we offer sizing insights for similar brands like:

We don’t just convert sizes—we understand how fabrics stretch, compress and shape.

Speedo Fit Tips from the Tellar Team

Try suits on dry but remember: they loosen when wet.
For racing suits, the tighter the better—just don’t cut off circulation.
For casual beachwear, choose comfort over compression.
For bust support, Speedo suits with built-in cups or racerback designs tend to be more flattering.
For kids, go one size up if they’re on the taller side of their age range.

Get Started with Tellar.co.uk – It’s Free & Easy

Want to get your Speedo size right the first time?

Here’s how to get started with Tellar:

✅ Step 1:Order your free measuring tape

✅ Step 2:Create your free profile with body measurements or known size

✅ Step 3: Get real-time sizing advice for Speedo and 1,500+ brands

✅ Bonus:Learn how Tellar works and how we’re 100% independent (no affiliate bias)

Follow Tellar for More Sizing Guidance

Stay up to date with the latest size guides, product tips and brand breakdowns:

We publish new sizing content weekly—based on real feedback and real fits.

Final Thoughts

Speedo makes some of the best performance swimwear in the world—but only if it fits. Don’t rely on guesswork or outdated charts. Whether you’re prepping for a race, a holiday, or the gym pool, Tellar.co.uk helps you get the fit right first time.

🟢 Try it now – it’s free and takes under 60 seconds

Because when it comes to swimwear, the right size makes all the difference.