What Is Sizing Like at Isabelle Blanche Paris? Your Complete Fit Guide

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

Isabelle Blanche Paris runs in Italian sizing and typically comes up one full size smaller than standard UK high street sizing — so if you're a UK 10, go for a size S (38-40 Italian). The brand leans into relaxed, feminine silhouettes, and while some styles have natural give, knowing this sizing quirk before you buy will save you an expensive return.

I'll be honest — I fell head over heels for Isabelle Blanche Paris the first time I saw their sequin-embellished knitwear. It's got that very specific energy: the kind of thing you'd spot in a Florentine boutique window and immediately think "yes, I need that in my life." And then you'd try to order it and realise it's an Italian size 40 and you have absolutely no idea what that means. That was me, a couple of winters ago. I got it wrong the first time (size too small, brutal lesson), so I'm going to make sure you don't repeat my mistake.

Who Is Isabelle Blanche Paris?

Isabelle Blanche Paris is a fashion brand that was born in France and blossomed in Italy — with its creative home now based in Florence. It's a genuinely lovely collision of those two worlds: French minimalism meets Italian craftsmanship and a love for colour, print, and a bit of drama. Think feminine dresses with just enough embellishment, richly textured knitwear, and playful tailoring that somehow feels both resort-ready and perfectly wearable on a chilly Tuesday.

The brand positions itself as dressing the "dynamic everyday woman" — and in practice that means pieces that feel special without being unwearable. It's not a basics brand. This is for women who want to actually enjoy getting dressed.

How Does Isabelle Blanche Paris Size?

The key thing to know: Isabelle Blanche Paris uses Italian numeric sizing. Labels show Italian sizes — so you'll see numbers like 38, 40, 42, 44 rather than the XS/S/M/L you might be used to. This trips people up all the time, and it's the source of most sizing confusion with this brand.

Here's a quick reference table to help:

Italian SizeUK SizeEU SizeUS SizeXS / 36UK 6EU 34US 2S / 38–40UK 8–10EU 36–38US 4–6M / 42UK 12EU 40US 8L / 44UK 14EU 42US 10XL / 46UK 16EU 44US 12

The general rule: size up by one from your usual UK size. If you're typically a UK 12 in Zara or M&S, order the M (42) in Isabelle Blanche — not the smaller S.

Does It Run True to Size?

Within its Italian size range, Isabelle Blanche Paris fits fairly true to the measurements. The brand itself says sizing is designed to be "comfortable and suitable for all body types" — and the cuts generally back that up with a generous, feminine ease rather than anything stiffly structured. That said, there are a few things to keep in mind:

Knitwear and tops — generally quite relaxed in cut. If you're between sizes, go down. The knits have natural stretch and going too large can lose the shape entirely.
Dresses — this is where I'd say go true to your converted UK size. Their dresses tend to be cut with some room through the body. If you're fuller in the bust, size up for comfort.
Sequin and embellished pieces — these can feel slightly firmer due to the fabric weight and lining. I'd always recommend sizing up one here if in any doubt.
Trousers and skirts — check the waist measurement carefully. Italian tailoring can be narrower through the waist and hip than UK equivalents, so don't go purely by number. Use your actual measurements.

Petite or Plus Sizing?

This is a gap in the Isabelle Blanche Paris offering — the brand currently runs from XS to XL (Italian 36–46), which is a UK 6–16. If you're petite, the good news is the relaxed silhouettes often work well at a shorter height — just watch trouser and dress lengths. There's no dedicated petite or plus-size range as yet, which is a shame given how wearable the aesthetic is.

What I'd Actually Buy From Isabelle Blanche

Honestly? Their knitwear is the thing I keep going back to. There's an effortless quality to it — the kind of jumper that looks like you put no effort in but also somehow looks very put-together. Their printed dresses are the other standout: feminine, vibrant, and they photograph beautifully. I wore one to a friend's birthday dinner last autumn and got asked about it approximately four times. Very much worth the sizing gymnastics.

If you want that Franco-Italian feeling without the price tag (or while you wait for your Isabelle Blanche to arrive), there are some brilliant alternatives on the high street:

High Street Alternatives Worth Knowing

Anthropologie — a natural home for anyone who loves Isabelle Blanche's feminine, print-led aesthetic. Their dresses and knitwear hit a very similar mood at a lower price point.
Cos — if it's the clean lines and quality fabrication you're after rather than the embellishment, COS delivers beautifully structured pieces in understated palettes.
Mango — brilliant for Mediterranean-inspired dresses and relaxed tailoring; their Resort and Studio lines in particular are a great dupe for that Italian holiday energy.
Whistles — consistently excellent for feminine, grown-up dressing with a quietly luxurious feel. Good quality knitwear that doesn't feel like it's trying too hard.
Me&Em — if you love the idea of wearing something that looks expensive and chic but is actually built to last, Me&Em is your friend. Their colour palette often mirrors the Isabelle Blanche world.
Reiss — for the more tailored, polished pieces (think wrap dresses and smart trousers), Reiss hits above its weight on quality and cut.
Phase Eight — particularly good for embellished occasion pieces and feminine dresses in the same spirit as Isabelle Blanche's more dressed-up styles.
Hobbs — excellent for relaxed tailoring with a European feel; well-made, classic and understated in the best possible way.

Two Independent Brands to Try

Damson Madder — a brilliant independent British brand with a very European sensibility. Their floral prints and easy dresses are a genuine match for Isabelle Blanche's spirit, at a more accessible price. Big on ethical credentials too.
Kitri Studio — London-based and utterly gorgeous. They do limited runs of beautifully cut dresses and separates in prints and colours that rival any Italian brand. Sell out fast, but absolutely worth watching.

Not Sure of Your Isabelle Blanche Size? Use Tellar — It's Free.

Isabelle Blanche Paris uses Italian numeric sizing, which doesn't always translate neatly to your usual UK size. That's exactly the kind of problem Tellar.co.uk was built to solve.

Tellar is the UK's leading free sizing tool — matching your exact measurements to 1,500+ brands in real time. No more guessing, no more expensive returns.

Measure once — bust, waist, hip, or use your size in a brand you already know
Use the Store Size Lookup tool to get your precise size in Isabelle Blanche Paris and 1,500+ other brands instantly
Always free — no app, no download, no subscription. Just works in your browser.

Plus, the Tellar Fashion Hub is packed with hundreds of free, honest, unsponsored articles from our in-house stylists — covering every brand, every style question, every fit dilemma.

Find My Isabelle Blanche Size →

More from the Tellar Fashion Hub

The Ultimate Clothing Sizing Guide — everything you need to know about how sizing works across brands
Jeans Trends 2026 — the cuts and styles actually worth buying right now
The Ultimate Guide to Dresses & Best Buys — style, fit, and where to shop for every body shape
The Ultimate Guide to Jackets & Best Buys — from blazers to bombers, every style covered

Tellar Fashion Hub posts are always honest, always independent, and never sponsored. Ella Blake is a fashion stylist writing for Tellar.co.uk. Some links may be affiliate links — this never influences editorial recommendations.