Fabletics Sizing Guide: How to Find Your Perfect Fit and What’s Worth Buying

Your essential guide to Fabletics sizing, fit tips, and must-have pieces—powered by Tellar.co.uk.

What Makes Fabletics Unique?

Founded by Kate Hudson in 2013, Fabletics has grown into one of the most well-known activewear brands globally. Offering fashion-forward gym wear, athleisure sets, and VIP membership discounts, Fabletics combines performance and style at a mid-range price point.

But while their designs are strong, Fabletics sizing can be inconsistent—especially across sports bras, leggings, and tops. With variations in stretch, compression, and fabric weight, even experienced shoppers can struggle to find the right size.

If you’re looking to build your activewear wardrobe without the hassle of trial and error, this guide will show you how to find your perfect Fabletics fit and what’s worth adding to cart.

Fast & Free: How to Find Your Fabletics Size Instantly

Skip the size chart guesswork. Tellar.co.uk is the UK’s leading free sizing tool, matching your body to the correct size in over 1,500+ brands, including Fabletics.

✅ Get started in seconds:

Create your free profile
Enter your body measurements (chest, waist, hips) OR tell us your size in a known brand
See instant size recommendations across Fabletics and similar activewear labels
Claim a free measuring tape by post to get your exact fit

No more returns. No more uncertainty. Just the right size every time.

Fabletics Sizing Explained: Key Fit Facts You Should Know

Fabletics uses US-based sizing, which can be confusing for UK shoppers. For example:

US 4 = UK 8
US 6 = UK 10
US 8 = UK 12

However, compression levels, fabric blends, and style intent (e.g., snug vs relaxed) all affect the true fit.

🧘‍♀️ Leggings & Bottoms

Often run small, especially in compression styles
High-waist options tend to cinch at the waist
Sizing up is recommended if between sizes

🏃‍♀️ Sports Bras

Fit depends heavily on cup size and support level
Low-impact bras may run true to size
Medium/high-impact styles may feel snug—use Tellar to align bust and band measurements

👚 Tops & Tanks

Typically true to size with stretch
Some boxy fits may feel oversized—check individual product details

📏 Use our measurement guide for best results with sports bras and leggings.

Top Fabletics Pieces Worth Buying

If you’re wondering what’s worth your money at Fabletics, start with these highly rated favourites:

1. PowerHold® Leggings

The brand’s bestselling compression leggings
Sculpting and supportive
High-waisted, moisture-wicking, squat-proof
Fit Tip: Run slightly tight—check your waist and hip ratio with Tellar

2. Trinity High Impact Sports Bra

Designed for cardio, HIIT, and running
Secure zip front and adjustable straps
Comes in extended sizing
Fit Tip: Ensure accurate bust & underbust measurement for support

3. On-The-Go Jogger

Great for casual wear or low-intensity workouts
Soft and breathable fabric
True to size but with a relaxed fit

4. SculptKnit Seamless Sets

Ultra-stretchy, breathable, seamless styles
Perfect for yoga or lounging
Fit Tip: Size down if you prefer a compressive feel

Tellar Tip: Don’t Rely on Labels Alone

Just because you’re a “UK 10” doesn’t mean you’re always a “Small.” At Tellar.co.uk, we match your actual body shape to the intended fit of every Fabletics item. That includes:

Compression level
Fabric stretch %
Intended use (e.g., cardio vs casual)

🧭 Log in now to check your best size in Fabletics

Common Fabletics Sizing Questions

❓ Do Fabletics leggings run small?

Yes—especially the PowerHold® and Motion365® ranges. They’re designed to feel snug and supportive, but may be too tight if you’re between sizes. Use Tellar to balance comfort with compression.

❓ How do Fabletics sports bras fit?

It depends on cup size and impact level. Compression-style bras often run tight. Adjustable styles with support bands tend to offer more flexibility.

❓ What size is a Fabletics Medium in UK sizing?

Typically a US 8 / UK 12, but this varies by product. Tellar provides your exact size conversion based on real measurements.

Explore our international sizing guide

Compare Fabletics to Other Activewear Brands

Here’s how Fabletics compares to popular competitors:

Brand	Fit Notes	Tellar Sizing Available
Gymshark	Slimmer fit, runs small in bottoms	✅ Yes
Lululemon	True to size but varies by range	✅ Yes
Sweaty Betty	UK sizing, stretchier fit in most items	✅ Yes
Nike	Generally consistent, wide range	✅ Yes
Adidas	Runs large in tops, true in bottoms	✅ Yes

🎯 Compare sizes across all activewear brands

CTA: Try Tellar for Free & Find Your Fabletics Fit

Want to shop smarter, not harder?

Here’s your next step:

✅ Create your free profile

✅ Log in to check your size

✅ Claim your free measuring tape

✅ Explore our latest sizing posts

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

Why Trust Tellar.co.uk?

At Tellar.co.uk, we’re not affiliated with Fabletics or any other brand. Our sizing tool is:

Independent and data-backed
Used by thousands of UK shoppers
Built to reduce returns and sizing frustration
100% free to use, forever

🎯 Learn more about us here

Follow Us for More Activewear Sizing Tips

Join our community for weekly sizing hacks, brand comparisons, and product advice:

Final Word: Fit Confidence Starts Here

Fabletics offers versatile, stylish, and performance-driven activewear—but only when you find the size that’s right for you. With Tellar.co.uk, you’ll know exactly what fits—before you ever hit checkout.

✅ Free

✅ Fast

✅ Trusted by thousands of UK shoppers

📌 Get started now with Tellar.co.uk