What Is Sizing Like at Karl Lagerfeld? The Honest Guide for UK Shoppers

Karl Lagerfeld as a brand runs slightly small, particularly on fitted pieces — so as a general rule, if you're between sizes, go up. That said, it's not a blanket "size up on everything" situation. The brand's silhouettes range from sharp, structured tailoring (where sizing is quite precise) to relaxed oversized knitwear and biker-inflected outerwear (where you can usually stick to your true size). Once you know the quirks by category, shopping this brand becomes much less of a gamble.

And it's absolutely worth getting right, because this is one of those labels that genuinely rewards the effort. I remember the first Karl Lagerfeld blazer I bought — a beautifully constructed double-breasted piece in classic black and white. I ordered my usual size, it arrived, and the shoulders were just slightly off. Not dramatically, but enough to ruin the line. I exchanged for a size up, and it was instantly that graphic, waist-cinched silhouette I'd had in my head. It's that kind of brand — the difference between right and slightly-wrong is stark.

A Quick Word on the Brand

The Karl Lagerfeld label — distinct from his legendary tenure at Chanel and Fendi — is his eponymous ready-to-wear brand, now continued under creative director Hun Kim. It's rooted firmly in Lagerfeld's personal aesthetic: monochrome palettes, crisp tailoring, a rock 'n' roll edge threaded through otherwise classic shapes. Think structured blazers, cigarette trousers, logo knitwear, sleek dresses, and those iconic Choupette cat references. It occupies a space between contemporary premium and accessible luxury — more wearable and affordable than Chanel, but sharper and more directional than your average high street. Current collections have leaned into strong-shouldered jackets, graphic black-and-white prints, and a beautifully Parisian kind of dressed-up dressing.

How Does Karl Lagerfeld Sizing Work? EU vs UK

Karl Lagerfeld uses European sizing, which doesn't map neatly to UK sizing. Here's the basic conversion to keep bookmarked:

EU 34 = UK 6
EU 36 = UK 8
EU 38 = UK 10
EU 40 = UK 12
EU 42 = UK 14
EU 44 = UK 16

So far, so straightforward — but this is where it gets slightly complicated. Even within those EU equivalents, Karl Lagerfeld tends to cut its structured pieces a little narrower than a standard European label might. Think of it as European sizing with a Parisian fit bias: slightly narrower through the shoulders and waist, and less forgiving on the hips in tailored styles. Add to that the fact that the brand's fabric choices are often structured with minimal stretch, and you'll understand why "just check the measurements" is genuinely the best advice here.

Sizing by Garment Category

Blazers & Structured Jackets

This is where Karl Lagerfeld really delivers — and where getting the size right matters most. The tailoring is sharp, double-breasted cuts with cinched waists are a house signature, and the silhouette is everything. These pieces run slim through the shoulders and waist. If you have broader shoulders or a fuller bust, size up. If you plan to layer underneath, size up. There is very little ease built into these pieces — they're designed to look exact, not relaxed.

Trousers & Pencil Skirts

Cigarette trousers and sculpted pencil skirts are another core Karl Lagerfeld category, and they are cut tight around the waist and hips with minimal stretch. I cannot stress enough: do not rely on the EU number alone here. Measure your waist and hips in centimetres and compare directly against the brand's measurements. If you're between sizes at all, go up. There's nothing worse than a beautifully cut pencil skirt that just won't sit properly on the hips — and with Karl Lagerfeld, the fit line is precise enough that even a centimetre or two matters.

Dresses

The dresses tend to be fitted through the bust and waist, with Karl's signature mid-length silhouettes sitting below the knee in a way that flatters most heights. Fit-and-flare styles are among the more forgiving — some reviewers actually find these run slightly generous in the skirt volume. For bodycon or structured sheath styles, treat sizing the same as you would the trousers: measure first, trust the tape over the label.

Knitwear & Sweatshirts

Happily, this is the most relaxed category for sizing. Logo sweatshirts, chunky knits, and casual tops generally run true to size or slightly generously — more so than the tailored pieces. This is where you can usually order your standard EU equivalent with confidence. The oversized streetwear-inflected pieces are designed to have volume, so unless you're petite and want to avoid being swamped, stick to your true size.

Outerwear

The coats and jackets have improved enormously in recent seasons — oversized biker jackets, eco-shearling puffers, and waist-cinched wool coats all feature heavily. For the cinched, tailored coats, treat sizing as you would the blazers (and size up if layering). For the oversized and bomber styles, your true size works well — the volume is intentional.

Shoes

Karl Lagerfeld footwear generally runs true to size in EU sizing. Heels tend to be well-constructed and the fit is fairly reliable. As always with luxury adjacent footwear, if you're a half size, go up — the brand doesn't offer half sizes across most styles.

My Honest Sizing Summary

Blazers & tailored jackets — size up if broad-shouldered, full-busted, or layering
Trousers & pencil skirts — measure your waist and hips; size up if between sizes
Fitted dresses — measure first; size up if curvier around the hips
Knitwear & sweatshirts — true to size; generous for the oversized pieces
Outerwear — true size for oversized styles; size up for cinched tailored coats
Shoes — true to EU size; go up if between sizes

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Love the Karl Lagerfeld Aesthetic? Here's Where Else to Shop It

The monochrome, sharply tailored, contemporary-luxe world of Karl Lagerfeld has plenty of kindred spirits across every price point. Here's where I'd send my clients depending on budget:

High Street & Contemporary

Massimo Dutti — Consistently my go-to for high street tailoring that doesn't look high street. Their structured blazers, cigarette trousers, and monochrome dressing are an excellent match for the KL aesthetic at a fraction of the price. Sizing is European and cuts clean.
Jigsaw — Brilliant for understated, sharp silhouettes. Jigsaw does tailored separates and knitwear particularly well, and their quality-to-price ratio is genuinely strong. A great option for the more classic, less logo-driven side of Karl.
Ted Baker — For the more dressy, occasion-led pieces — structured cocktail dresses, sharp blazers, sleek midi skirts. Ted Baker has grown up a lot in recent years and the quality has followed.
Hobbs — Sharp, polished, and excellent for tailored workwear that channels Lagerfeld's professional precision. Their coats in particular are reliably well-cut and great value for money.
LK Bennett — Pencil skirts, structured dresses, and smart-casual pieces with a real editorial edge. This is where I'd point someone who loves the Karl Lagerfeld tailored dress silhouette but wants something a little more accessible.
Phase Eight — Particularly good for occasion dresses with that clean, architectural quality. Their fit-and-flare styles and midi dresses are consistently well-reviewed.
All Saints — For the rock 'n' roll, biker-inflected side of Karl Lagerfeld's DNA — leather jackets, dark minimal pieces, effortlessly edgy basics. All Saints nails this end of the aesthetic reliably well.
Hugo Boss — If it's the sharp professional tailoring you're after — the power blazer, the perfectly cut trousers — Hugo Boss is probably the best high street equivalent. The quality and cut is excellent for the price.

Two Independent Brands Worth Discovering

Cefinn (cefinn.com) — Founded by TV presenter and genuine fashion obsessive Samantha Cameron, Cefinn produces beautifully considered, contemporary pieces with real attention to fit and fabric. It's a British independent brand that punches well above its profile — the tailored separates, silk pieces and sharp outerwear all sit perfectly alongside the Karl Lagerfeld aesthetic. Under-the-radar, well-made, and worth every penny.
Aeron (aeron.eu) — A contemporary European womenswear brand built around sharp, architectural silhouettes and a distinctly graphic sensibility. If you love the clean monochrome world of Karl Lagerfeld but want something a little more directional and less immediately recognisable, Aeron is a genuinely exciting find. Favoured by fashion editors who prefer their style to do the talking quietly.

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Karl Lagerfeld is one of those brands where the clothes are so distinctive — so entirely themselves — that getting the fit right feels important in a way it doesn't with more anonymous labels. The monochrome tailoring, the sharp lapels, the perfectly placed KL monogram — it all only works when the size is correct. Take five minutes to measure properly before you order, and you'll wonder why you ever did it any other way.