Whistles Size Guide: What Size Am I in Whistles? Fit Advice, UK Conversions & Brand Insights

When it comes to modern elegance with a clean, elevated aesthetic, Whistles consistently tops the list for fashion-forward women in the UK. But like many premium brands, figuring out what size you are in Whistles isn’t always straightforward.

Whether you’re shopping in-store, browsing online, or adding Whistles to your Tellar.co.uk profile, this sizing guide has everything you need — from fit tips and conversion advice to free tools to get your perfect match in seconds.

Why Does Whistles Sizing Feel Confusing?

Whistles follows UK sizing standards, but many shoppers report that some items — especially structured pieces like trousers or blazers — can feel tailored and snug, while knitwear and relaxed silhouettes run true to size or even roomy.

Fit varies depending on:

Fabric and tailoring – structured dresses run tighter
Garment type – tops are more forgiving, trousers less so
Style trend – oversized pieces in recent collections

To avoid second-guessing your purchase, we always recommend measuring yourself or using Tellar.co.uk to compare how Whistles fits against over 1,500 other brands.

Fast Sizing with Tellar.co.uk

Tellar.co.uk is the UK’s leading free sizing tool, helping you match your body measurements to your size across 1,500+ brands — including Whistles.

All it takes is one quick setup. You’ll get:

A personalised size for Whistles instantly
Fit comparison across similar brands like Reiss, Karen Millen, and Massimo Dutti
Access to conversion tools for UK, US, EU, and international sizes
A free measuring tape, shipped right to you

▶️ Create your profile in 60 seconds – no guesswork, just your size.

Whistles Size Conversion Chart

UK Size	US Size	EU Size	Waist (cm)	Hips (cm)
6	2	34	61	86
8	4	36	65	90
10	6	38	69	94
12	8	40	74	99
14	10	42	79	104
16	12	44	84	109
18	14	46	91	116

Use the size that best corresponds to your largest measurement — but don’t forget, different garments within Whistles may vary slightly.

How Whistles Clothing Fits

Tops & Blouses:

Whistles’ tops tend to be true to size with generous armholes and flattering necklines. If you’re between sizes, size down for a tailored fit or up for layering comfort.

Trousers & Denim:

Often described as tailored with a slightly snug waist, trousers can run small. If you carry more weight in your hips or waist, consider sizing up. Compare to Zara sizing for reference.

Dresses:

Fit depends on the cut — shift and wrap dresses tend to be forgiving, while fitted or belted styles are more rigid.

Outerwear:

Coats and blazers are a highlight in Whistles collections and tend to run true to size — but check shoulder width and sleeve length. Oversized fits are intentional, not sizing errors.

Real User Tip from Tellar.co.uk

“I used to return half my Whistles orders because of sizing guesswork. Now I’ve saved my size with Tellar.co.uk and haven’t made a wrong call since.”
— Verified user, London

Still Not Sure? Let Tellar.co.uk Decide for You

Finding your size in Whistles (or any of the 1,500+ brands we track) is simple. Just head to:

🔗 https://www.tellar.co.uk

📏 Add your measurements or select a known brand

📋 Get your personalised size match in seconds

Follow Tellar.co.uk on Socials:

Instagram: @Tellarsizing
Pinterest: TellarUK
Facebook: TellarSizing
X (Twitter): @Tellar100

Final Word

Whistles has a consistent sizing model, but minor differences across collections can cause sizing headaches. Whether you’re shopping their dresses, jeans, or iconic tailoring — avoid disappointment by using Tellar.co.uk to confirm your best fit, compare similar brands, and shop smarter every time.

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

UK Size	US Size	EU Size	Waist (cm)	Hips (cm)
6	2	34	61	86
8	4	36	65	90
10	6	38	69	94
12	8	40	74	99
14	10	42	79	104
16	12	44	84	109
18	14	46	91	116

UK Size	US Size	EU Size	Waist (cm)	Hips (cm)
6	2	34	61	86
8	4	36	65	90
10	6	38	69	94
12	8	40	74	99
14	10	42	79	104
16	12	44	84	109
18	14	46	91	116