What to Wear This Autumn — And How to Make Sure It Fits Every Time

As the leaves begin to fall and the mornings start to feel crisp, there’s something exciting about swapping out light summer clothes for autumn’s cosier, richer wardrobe. Chunky knits, tailored coats, structured boots — this is the season when fashion truly comes into its own.

But if you’ve ever found yourself drowning in an oversized jumper or struggling to button a new coat despite ordering your “usual size”, you already know the biggest challenge of autumn dressing: getting the fit right.

That’s where Tellar.co.uk makes all the difference. Whether you're layering up or dressing for transitional weather, Tellar takes your exact measurements and matches them to the sizing charts of 1,500+ brands, so you know exactly what size to buy in each store. It’s fast, accurate, and totally free to use.

Here’s your guide to the best autumn clothes — and how to make sure every piece fits perfectly.

1. The Statement Coat

Autumn is the season of coats, and investing in the right one can transform your entire wardrobe. Whether you go for a classic belted wool wrap, a structured trench, or an oversized cocoon style, the coat you choose will get plenty of wear.

But coats can be tricky to size. Some are designed for layering, others are more fitted. Brands like Reiss or Massimo Dutti often run small, while COS may lean toward oversized cuts.

Instead of guessing, just pop your measurements into Tellar.co.uk. You’ll instantly find the size that works for your shoulders, bust, and hips — based on the actual cut of each brand.

Top Tip: If you don’t have a tape measure at home, Tellar even offers a free printable measuring tape to help you get started — download it here.

2. Chunky Jumpers & Layering Knits

There’s no better feeling than pulling on a chunky jumper when the temperature dips. This season, textured knits, roll-necks, and oversized styles are everywhere — but how they fit you will depend heavily on brand and fabric.

Some high street favourites like Zara tend to run short in the torso, while others like & Other Stories offer a more relaxed, slouchy fit. And if you're shopping for cashmere or wool blends, you want a shape that drapes comfortably without clinging or bulking.

Instead of buying multiple sizes to “try at home” (and returning half of them), just enter your chest and waist measurements at Tellar.co.uk. You'll get a direct recommendation that actually reflects your body — not a vague ‘S/M/L’ label.

3. Long-Sleeved Dresses

Who says dresses are just for summer? In autumn, a good long-sleeved midi dress becomes your go-to for everything from workdays to weekend brunches. Pair with boots, throw on a leather jacket or trench, and you’re good to go.

Whether it’s a ribbed knit dress, a printed shirt dress, or a wrap silhouette, the fit across your waist, hips, and bust matters. Many brands size inconsistently — Whistles tends to run true, while Mango sometimes comes up large, and Zara often cuts narrow across the hips.

Use Tellar’s store size lookup tool to see how your favourite stores compare — and find out which size will actually work for you, not just which one should.

4. Tailored Trousers

Autumn is the time to get back into trousers — think tailored wool blends, soft corduroys, and high-waisted pleats. These look sharp with a tucked-in knit and loafers or can be dressed down with a tee and blazer.

The issue? Waist and hip proportions. A pair that fits your hips might gape at the waist, or a flattering waist might pull uncomfortably at the thigh.

That’s exactly why Tellar.co.uk exists — so your trousers actually fit both your waist and hips, not just one or the other. Enter your profile once at www.tellar.co.uk, and the platform tells you which size to go for in each brand.

5. Trench Coats & Shackets

For those in-between days where it’s too warm for a heavy coat but too cold for just a jumper, trench coats and shackets (shirt jackets) are ideal. They layer well, work across dressy and casual outfits, and flatter a wide range of body types.

But sizing is notoriously unpredictable. Trench coats from Hobbs may run generous in the bust, while Topshop’s old styles used to come up tight across the arms.

Don’t guess. Just check Tellar. You’ll instantly see what size fits your shoulder, chest, and sleeve length best, based on your real measurements, not generic sizing rules.

6. Boots & Bottom Layers

While Tellar doesn’t yet offer shoe sizing, it does help your trousers, jeans, leggings and skirts fit perfectly — so your boots work with your outfit rather than against it.

For example, if you're wearing knee-high boots with a midi skirt or fitted jeans, you need slim-fitting bottoms that don’t bunch awkwardly. Tellar helps ensure your base layers are flattering and fitted correctly, whether you’re shopping at M&S, H&M, or Arket.

Why So Many Autumn Clothes Don’t Fit Right

You’ve probably experienced this:

A dress fits beautifully on top but clings at the hips.
A jumper is perfect until you try to layer it under a coat.
A pair of trousers looks great online but sags at the waist.

It’s not your body — it’s inconsistent sizing. Most brands use their own sizing models, and they rarely match your actual proportions.

Tellar takes the guesswork out. You enter your bust, waist and hip measurements once, and Tellar does the rest:

✅ Matches you to 1,500+ brand size charts

✅ Works in cm or inches

✅ Completely free — no hidden costs

✅ Only requires a one-time login

✅ Includes a free printable measuring tape

✅ Instant, accurate results

Try Tellar.co.uk Today

If you’re shopping for your autumn wardrobe, don’t buy blind. Try Tellar.co.uk before you check out. You’ll save time, money, and avoid that frustrating feeling when clothes arrive and just don’t fit.

It’s fast. It’s accurate. It’s free.
Get started here: https://www.tellar.co.uk

Follow Tellar for More Fit Tips & Styling Insights

Stay ahead of trends and get weekly insights on which brands run large, small, or true to size:

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

Final Word

This autumn, don’t just layer up — size smarter. From structured coats to everyday knits, every great outfit starts with the right fit. With Tellar.co.uk, it’s never been easier to get it right.

Ready to shop with confidence?

👉 Find your size now