Y.A.S Size Guide UK: What Size Am I in Y.A.S? Fit Advice & International Conversion Help

Y.A.S (Your Apparel & Style), part of the Bestseller group, is known for its sleek tailoring, feminine silhouettes, and contemporary occasionwear. Whether you’re shopping for a floaty midi dress, oversized blazer or minimalist co-ord, getting the right size in Y.A.S is key—especially if you’re navigating between UK, EU or international sizes.

If you’re wondering “What size am I in Y.A.S?”, Tellar.co.uk makes it easy. We’ve analysed thousands of size charts, brand-specific data, and real customer returns to create the UK’s most accurate clothing size tool—used by thousands of women every day.

Start Here: Get Your Personal Y.A.S Size in Seconds

🟢 Click here to create your free Tellar.co.uk profile

Just enter your body measurements (or your usual size in another brand like Zara or ASOS), and we’ll instantly tell you your best size in Y.A.S – and over 1,500+ brands.

📦 No more guesswork. No more returns. Just the right fit every time.

It’s fast, completely free, and always accessible. One-time setup, lifetime accuracy.

Is Y.A.S True to Size?

Generally, Y.A.S runs true to size, but some pieces can vary depending on fabric and cut:

Tailored pieces (like blazers and trousers) may feel snug across the shoulders or waist.
Flowy dresses and oversized shirts often offer more generous fits.
Knitwear can be slightly larger, especially in relaxed silhouettes.
Stretch materials (jersey, ribbed knit) are usually more forgiving than woven fabrics.

To eliminate the guesswork, Tellar.co.uk converts your body shape or existing size into your most accurate Y.A.S equivalent, automatically adjusting for fit type.

Yas UK Size Chart (with EU and International Conversion)

UK Size	EU Size	Bust (inches)	Waist (inches)	Hips (inches)
UK 6	EU 34	31.5	24.5	34.5
UK 8	EU 36	33	26	36
UK 10	EU 38	34.5	27.5	37.5
UK 12	EU 40	36	29	39
UK 14	EU 42	38	31	41
UK 16	EU 44	40	33	43
UK 18	EU 46	43	36	46

Prefer your measurements in centimetres? Use the unit toggle inside your Tellar.co.uk profile to view CM or IN automatically.

Does Y.A.S Fit the Same Across All Styles?

Not quite. While Y.A.S sizing is consistent within collections, fit can differ by item type. Here’s what Tellar users have reported:

Structured blazers & fitted tops – May feel snug; some users prefer to size up, especially if they have a larger bust or broader shoulders.
Midi dresses & wrap silhouettes – These tend to be more forgiving and run true to size.
Trousers & co-ords – Waist sizing can be firm with minimal stretch; accurate waist measurement is key.
Occasionwear – Often cut for a slim profile, especially at the hip and thigh.

To compare Y.A.S sizing with other brands like & Other Stories, Mango, or Sister Jane, use our live comparison tool:

👉 https://www.tellar.co.uk/store-size-lookup/

Yas vs Other Brands: Fit Comparison

If you typically wear a UK 10 in Zara or a UK 8 in COS, your size in Y.A.S may vary. That’s why we built Tellar.co.uk to automatically calculate your Y.A.S fit based on what you already wear elsewhere.

Want to know how Y.A.S sizing compares to:

Reiss
Sister Jane
French Connection
Whistles

We’ve already done the work—just input your details once and Tellar matches the rest.

How to Measure Yourself for Y.A.S Sizing (The Right Way)

You don’t need to be exact down to the millimetre—but good measurements matter.

Use the free Tellar.co.uk tape measure (yes, we’ll post it to you!) or grab a soft measuring tape and:

Bust: Measure at the fullest point with arms down
Waist: Measure the narrowest part above your belly button
Hips: Measure the widest part around your bottom

Save them to your Tellar profile and instantly see the best size in Y.A.S and over 1,500 other labels.

UK Shopper Reviews: Y.A.S Sizing Feedback

Here’s what UK Tellar users have said:

“I wear a UK 10 in most brands, and Tellar matched me to a Y.A.S 10—it fit like a glove.”
“Some of their trousers were a bit snug on the waist. I sized up using Tellar and it was perfect.”
“I love that I never need to check the size chart now—I just use my profile.”

Join the thousands of women who rely on Tellar.co.uk every week.

Still Unsure? Use Tellar’s Smart Fit Tool

With just a few clicks, you’ll know:

✅ Your exact Y.A.S size in UK, EU, or CM

✅ How Y.A.S compares to other high street or designer brands

✅ Which pieces may run small or large

✅ Your best fit in over 1,500 other fashion labels

Try it now—it’s free and easy

Follow @TellarSizing for Real-Time Sizing Tips

For daily fit advice, new brand breakdowns, and size alerts:

Instagram: @TellarSizing
Pinterest: TellarUK on Pinterest
Twitter (X): @Tellar100
Facebook: Tellar Sizing on Facebook

Final Tip

Before your next Y.A.S purchase, skip the returns.

Get your accurate size first with Tellar.co.uk – your go-to sizing tool for over 1,500+ fashion brands.

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