Cosy, iconic, and unexpectedly versatile, UGG has become a wardrobe staple far beyond its Australian surf roots. Whether you’re slipping into Classic Mini boots, platform Tazz slippers, or their expanding collection of loungewear and coats—one question remains:
What size am I in UGG—and does it run big or small?
🧦 Tellar.co.uk helps you find your perfect fit in thousands of brands, including UGG. We’ll send you a free measuring tape, and after a quick one-time setup, Tellar gives you accurate sizing advice across all UGG categories—boots, slippers, clothing, and more. Always free. No guesswork.
About UGG: From Classic Boots to Fashion-Luxe Loungewear
Originally designed as sheepskin boots for surfers, UGG has evolved into a lifestyle brand stocked across ASOS, Schuh, JD Sports, Office, and Selfridges, offering:
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Iconic UGG Classic boots (Mini, Ultra Mini, Short, Tall)
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Platform slippers like Tazz, Tasman, and Disquette
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Cosy slippers, socks and slides
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Minimalist outerwear, hoodies, joggers and accessories
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Men’s and kids’ ranges
But with US sizing on many labels and frequent changes in lining material, sole height, and platform base, sizing isn’t always straightforward.
So—Does UGG Run Big or Small?
UGG boots tend to run large, especially when worn without thick socks. Most people find they need to size down by half or a full size from their usual UK shoe size. UGG slippers vary: some are snug at first and mould to your feet, while others run big due to plush lining.
UGG apparel (hoodies, joggers, coats) typically runs true to size, with a relaxed, loungewear fit.
Fit Snapshot:
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Classic UGG boots – run large (size down 0.5–1 full size)
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Platform boots/slippers – run large, especially if unlined
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Slides & open-back slippers – may slip off if not sized down
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Loungewear – true to size or relaxed
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Coats & outerwear – oversized in some designs, true to size overall
📏 Check your UGG size now using Tellar’s size lookup tool. We use real product fit data and match it to your measurements—instantly.
UK to UGG Size Conversion Chart (Footwear)
| UK Women’s | US UGG Size | Fit Tip |
|---|---|---|
| UK 3 | US 5 | May feel roomy—size down |
| UK 4 | US 6 | Size down if between sizes |
| UK 5 | US 7 | Commonly chosen size—watch lining compression |
| UK 6 | US 8 | May run long depending on boot |
| UK 7 | US 9 | Consider thicker socks |
| UK 8 | US 10 | True to size in structured boots |
🎯 Create your free Tellar profile here for a personalised size across UGG’s platforms, boots, and apparel—based on your foot shape, width, and sock preference.
UGG Fit by Category
1. Classic Boots (Mini, Short, Ultra Mini, Tall)
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Fit: Run large due to sheepskin lining
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Size Tip: Size down by half or full size for a snug fit
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Tellar Tip: Tellar adjusts for foot length, width, and lining compression
2. Slippers (Tazz, Tasman, Scuffette, Coquette)
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Fit: Some run large due to no heel hold
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Size Tip: Size down if between sizes
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Tellar Tip: Foot width and arch height calculated to ensure slippers don’t slip off
3. Slides & Fluff Styles (Disquette, Fluff Yeah)
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Fit: Fluffy upper may make them feel tighter at first
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Size Tip: True to size or size down for half sizes
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Tellar Tip: Foot length-to-volume ratio built into recommendation
4. Apparel (Hoodies, Joggers, Puffer Coats)
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Fit: Relaxed and true to size
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Size Tip: Stay with your regular size unless you prefer fitted layers
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Tellar Tip: Shoulder width + torso length used for outerwear accuracy
Why UGG Sizing Can Be Confusing
UGG sizing varies by product line and material, including:
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US sizing labels on boots sold in the UK
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Lining compresses over time, changing the fit
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Platform bases affect sizing feel
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Apparel varies between relaxed and structured fits
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No insole length listed for most online retailers
Instead of guessing or ordering multiple sizes, Tellar.co.uk calculates your perfect fit across UGG and thousands of other brands, using actual product data.
🎁 Every profile comes with a free tape measure, so you only have to enter your details once.
Popular UGG Pieces (and How They Fit)
⭐ UGG Classic Ultra Mini Boot
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Fit: Runs large; may slip at heel if too loose
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Tellar Tip: Tellar flags the need to size down based on foot width and sock use
⭐ UGG Tazz Slipper
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Fit: Roomy toe box, firm sole
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Tellar Tip: Great for wider feet—Tellar adjusts to prevent heel slip
⭐ UGG Teddy Sherpa Coat
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Fit: Relaxed, boxy
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Tellar Tip: Uses bust and layering preferences for size match
⭐ UGG Scuffette II Slippers
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Fit: True to size, may feel snug initially
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Tellar Tip: Tellar predicts break-in stretch and foot width
Related Fit Guides You’ll Find Helpful
Browse more in the Tellar Blog or get instant sizing help through the Store Size Lookup Tool.
Why Tellar Works for UGG—and Thousands of Brands
UGG sizing depends on boot structure, sole base, lining material, and fit style. Tellar makes it easy by combining:
✅ Free tape measure
✅ One-time profile setup
✅ Foot and body dimension logic
✅ Style-specific recommendations
✅ Sizing across thousands of brands
🧤 Whether you’re buying UGG, North Face, Nike, or Birkenstock—Tellar helps you size it right, first time.
Follow Tellar for Sizing Tips & Drop Alerts
Final Verdict: Is UGG True to Size?
Boots and slippers often run large—clothing runs true. Most customers find they need to size down in UGG footwear, especially Classic boots and Tazz/Disquette slippers.
🎯 Avoid sizing mistakes. Let Tellar.co.uk guide you to the perfect UGG size—across all categories and thousands of brands.
✅ Ready to Find Your UGG Size?
Find your size in thousands of brands real-time. It’s free & easy.
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