What Is Sizing Like at Oska Clothing?

By Ella Blake — Fashion Stylist | Tellar Fashion Hub — Always honest, unbiased & unsponsored

Oska uses its own numerical sizing system — 1, 2, 3, 4, and 5 — rather than standard UK sizes, and the clothes are cut generously and loosely by design, so you will almost certainly size down from what you'd normally expect. If you're a UK 12, for example, an Oska size 1 or 2 is likely your fit, depending on the garment. This is one brand where reading the measurements carefully really pays off — but once you've cracked it, the clothes are absolutely glorious.

Understanding Oska's Sizing System

This is the bit that trips people up, and it's worth spending a moment on before anything else. Oska does not use UK, EU, or US sizing in the conventional sense. Instead, they use a five-point scale — sizes 1 through 5 — which roughly corresponds as follows:

Oska SizeUKEUUSBust (cm)Waist (cm)Hips (cm)18–1036–384–684–8866–7090–94212–1440–428–1092–9674–7898–102316–1844–4612–14100–10482–86106–110420–2248–5016–18108–11290–94114–118524–2652–5420–22116–12098–102122–126

A crucial thing to understand here: because Oska garments are intentionally designed with a relaxed, oversized, or draped silhouette, the size you choose is determined more by your body's base measurements than by wanting a close fit. The ease is already built in. If you're sitting right on the boundary between two sizes, most Oska devotees I've spoken to tend to go with the smaller size — the generous cut does the rest of the work.

What Oska Is — And Who It's Really For

Oska is an Austrian brand, founded in Vienna, with a strong following across Germany, the Netherlands, Scandinavia, and the UK. It has its own standalone boutiques as well as stockists in independent fashion boutiques up and down the country — you'll often find it alongside other artisan European labels like Annette Görtz or Rundholz.

The aesthetic is what I'd describe as wearable art. Think voluminous linen trousers, asymmetric hemlines, beautifully textured jackets in muted earthy tones — taupe, slate, terracotta, ink — and the odd structural piece that you genuinely can't place in a trend cycle because it exists outside of one entirely. The fabrics tend to be natural — linen, cotton, viscose, wool — and the construction is thoughtful. These are not throwaway pieces.

The woman who gravitates towards Oska tends to be confident in her own skin, not interested in chasing the high street, and looking for clothes that feel considered rather than consumed. That said, I've recommended Oska pieces to clients in their thirties right through to their seventies — the brand skews mature in its marketing, but the clothes genuinely work across a wide age range if the aesthetic clicks with you.

How the Clothes Actually Fit — Category by Category

Trousers & Wide-Leg Styles

This is arguably Oska's strongest category and the gateway garment for most new converts. Their wide-leg and tapered trousers are beautifully cut — often in linen or a linen blend — and the fit across the hip and thigh is intentionally relaxed. Because the waistband is frequently elasticated or adjustable, these tend to accommodate a range of bodies extremely well within each size. If you carry your weight in your hips or thighs, this is genuinely a brand worth exploring — the silhouette is flattering precisely because it doesn't cling.

Tops & Blouses

Again, cut with ease. Oska tops are not meant to be fitted — if you're used to buying shaped or tailored blouses and you try to size down here expecting a neat silhouette, you'll end up with something that pulls across the bust and looks wrong. Embrace the volume. Their layering pieces — long tunic styles, asymmetric blouses — are genuinely some of the most wearable things in my wardrobe rotation for autumn and spring.

Jackets & Outerwear

Oska jackets are a long-term investment and I don't say that lightly. The construction and fabric quality are genuinely excellent at this price point. They tend to have a structured-but-relaxed quality — think an unlined linen blazer that looks thrown on but is actually perfectly cut. Sizing here is consistent with the rest of the range. If you plan to layer heavily underneath in winter, go up a size.

Knitwear & Dresses

Oska knitwear is substantial — chunky, textured, often in wool or wool blend — and the oversized proportions are very much part of the design intent. Their dresses range from simple linen shifts to more sculptural, draped styles, and because they're cut to hang rather than cling, they work beautifully across body shapes. Midi and maxi lengths dominate, which suits the brand's unhurried aesthetic perfectly.

Styling Tips for Oska

Lean into proportion play — Oska's voluminous silhouettes work best when you balance them thoughtfully. Wide trousers with a flowing top? Add a heel or a sleek pointed flat. Oversized jacket? Keep the base layer close and minimal.
Invest in the linen — their linen pieces in particular are exceptional. They soften and improve with every wash, and the natural crumple is entirely intentional.
Stick to a tonal palette — Oska's own colour stories are beautifully edited. If you're mixing in pieces from elsewhere, pick one of their tones and match to it. Earthy neutrals, dusty pinks, and deep inky blues work best.
Don't be afraid of the volume — the most common mistake I see clients make with Oska is trying to make it look more conventional. The whole point is the drape and the ease. Own it.

If You Love Oska, Also Consider These

High Street & Accessible Alternatives:

Cos — the most natural high street parallel to Oska's ethos. Minimalist, architectural cuts, quality natural fabrics, restrained palette. A very sensible starting point if the Oska price point is a stretch.
Jigsaw — consistently strong on well-cut linen trousers, relaxed tailoring, and the kind of understated palette that Oska fans appreciate. Great quality-to-price ratio.
White Stuff — more casual in its execution but shares Oska's love of natural fabrics and easy, comfortable fits. Particularly good for layering pieces and relaxed linen separates.
Whistles — for occasions when you want the Oska sensibility but in a slightly more polished, office-ready execution. Their wide-leg trousers and structured tops are particularly strong.
Massimo Dutti — beautiful natural fabric pieces at a more accessible price than Oska, with a similarly European, understated aesthetic. Their linen blazers are exceptional.
Anthropologie — for the more bohemian, artistic side of Oska's aesthetic. Lovely for layering pieces, printed blouses, and textured knitwear with an independent spirit.
Me&Em — a strong British option for relaxed, quality-led separates in natural fabrics. Their wide-leg trousers and linen blend pieces frequently land in this territory.
Hush — quietly excellent for relaxed, considered pieces in natural fabrics. Very much the same unhurried energy as Oska but at a slightly lower price point.

Premium Alternatives:

Max Mara — for the client who wants Oska's quality and understated European elegance at a luxury price point. Their outerwear in particular is in a class of its own.
Claudie Pierlot — a Parisian brand with a similarly artistic, feminine take on wearable separates. More polished than Oska, but shares the considered approach.

Two Independent Picks You Might Not Know:

Annette Görtz — a German label that sits in a very similar space to Oska — sculptural, quality-led, relaxed tailoring in natural fabrics. If you love Oska, this is the next logical discovery. Stocked in good independent boutiques across the UK.
Bryn Walker — a California-based label with a loyal cult following among women who love exactly the kind of easy, artistic dressing Oska does so well. Flowing linens, relaxed silhouettes, natural dyes. Worth hunting down if you can't get enough of this aesthetic.

Cracking Oska's Sizing? Let Tellar Do It For You

Oska's own sizing system is one of the most confusing in women's fashion if you're coming to it fresh — which is exactly why Tellar.co.uk is so useful. It's the UK's leading free sizing tool, matching your measurements to 1,500+ brands instantly.

📏 Measure once — bust, waist, and hips (or use a brand size you already know fits well)
🔍 Use the Store Size Lookup tool to get your precise recommended size in Oska and 1,500+ other brands — no guesswork, no returns faff
✅ Always free — no app, no login, works straight in your browser

Oska's generous cuts mean getting the size right from the start is everything — and Tellar makes that easy.

Find My Size at Oska →

More from the Tellar Fashion Hub

The Ultimate Clothing Sizing Guide — everything you need to know about how brands size, how to measure yourself accurately, and why sizes vary so much between labels
Jeans Trends 2026 — the cuts, washes, and styles worth investing in right now
Ultimate Guide to Dresses & Best Buys — from bodycon to midi, the definitive dress guide matched to your body shape
Ultimate Guide to Jackets & Best Buys — leather, denim, blazers and more, matched to your shape and style

All posts on Tellar Fashion Hub are written independently by our stylists. We are not sponsored by any brand featured in this article. If we recommend it, it's because we genuinely think it's worth your attention.