What Is Sizing Like at Seletti?

The short version: Seletti Concept Store runs small it is a multi-brand luxury boutique, so fit changes designer by designer. Most of their roster is European or American contemporary labels, which means a lot of slim French cuts that run small, a few deliberately oversized labels, and some genuinely true-to-size names in between. Always check the individual designer, not "Seletti."

First, which Seletti are we talking about?

Worth a quick untangle, because the name causes confusion. There's the Italian Seletti design house — the people behind the monkey lamps, the Toiletpaper homeware and all those gorgeously daft objects. That's not clothing. The clothing one is Seletti Concept Store, a curated womenswear, beauty and design boutique that leans into the playful crossover between fashion and art. Different business, same eye for the unconventional. When someone says "Seletti clothing," this is the one they mean.

How the most-stocked designers actually fit

Because the store carries a rotating cast of labels, here's how the names you'll bump into most often tend to size up. This is the bit I'd genuinely tattoo on the back of my hand before checkout:

GANNI — Danish, generally true to size with a relaxed, easy cut. Their ready-to-wear is forgiving, but the denim runs noticeably smaller, so size up on jeans even if your tops are spot on.
Isabel Marant — French sizing and famously cut slim, especially through the shoulder and arm. Most people take a size up from their UK number here. A French 38 is not your friend if you're a UK 12.
The Frankie Shop — oversized by design. The boxy blazers and slouchy tailoring are meant to swamp you slightly, so take your normal size for the intended look, or size down only if you want it sharper.
Sporty & Rich — American casual, true to size but roomy. Hoodies and tees have that relaxed gym-club fit, so no need to go up unless you want it properly slouchy.
Anine Bing — broadly true to size, though the tailoring and denim can run a touch snug. Safe to stick to your usual on knitwear and tees.
Khrisjoy — those cult puffers run very oversized and use a numeric system (0, 1, 2…). Size down, and don't panic when a "1" looks enormous on the hanger.

The pattern, if you want one: anything French or Italian tends to run small and slim, anything Scandi or American tends to run true-to-size-but-relaxed, and a handful of labels are oversized on purpose. Knowing which camp a piece falls into matters far more than the number on the tag.

A fail and a win, from me

The fail first, because it's the more useful one. Early on, I ordered a GANNI midi from a concept store exactly like Seletti, saw my usual UK size sitting there in EU numbers, and clicked without thinking. It arrived in Danish sizing, fit beautifully through the body and then refused to do up over a perfectly average ribcage. Lovely dress. Wrong size. A returns slip and a fortnight later, it finally fit — and I've checked the designer's own size logic every single time since.

The win came from the opposite mistake going right. I'd been nervous about a Frankie Shop blazer because everyone warns you it's huge, so I almost sized down. I didn't — I trusted that the oversized line is the whole point — and it turned out perfect: that sharp-shouldered, sleeves-pushed-up, borrowed-from-a-very-chic-man silhouette. Sometimes the right move is to let a brand be exactly as oversized as it wants to be.

Reading a Seletti product page properly

To their credit, Seletti Concept Store doesn't leave you guessing. Each product page carries a size conversion chart, the garment's own measurements, and — the bit I always check — the size and measurements of the model wearing it. Use them like this:

Find the designer first. Note who actually makes the piece, then size to that label's reputation rather than a generic chart.
Trust the garment measurements over the size name. A flat bust and waist measurement never lies the way a "M" can.
Use the model's stats as a sense check. If she's a UK 8 and the dress looks fitted on her, a UK 12 will read closer than the size label suggests.
Mind the fabric. Stretch crepe and jersey forgive a lot; rigid cotton, leather and structured tailoring forgive nothing.

Find Your Perfect Fit — Before You Check Out

Shopping a multi-brand store like Seletti means juggling a dozen different sizing systems at once. Tellar's free Store Size Lookup matches you to your exact size across 1,500+ brands, so you know whether you're a GANNI 38 or an Isabel Marant 40 before you spend a penny.

Use the Store Size Lookup Explore Tellar

Where else to shop the Seletti look

Because Seletti is a curated edit rather than a label, the best "alternatives" are other places to find the same kind of designers — across every budget. Here are my fresh picks, none of them lazy substitutes:

Accessible & high street

& Other Stories — the closest thing to a concept-store mood on the high street, with that Scandi-meets-Parisian polish and reliably true-to-size cuts.
Mango — their elevated edit borrows heavily from the same contemporary references; tailoring runs slim, knitwear true to size.

Premium stockists

Browns — the London original concept store, carrying many of the exact designers Seletti does, with deep stock and proper fit notes.
Liberty London — beautifully curated contemporary and luxury edit under one roof, strong on the playful, art-leaning labels Seletti favours.

Luxury multi-brand

Net-a-Porter — the gold standard for designer breadth, with the clearest size-and-fit guidance in the business.
Mytheresa — a tightly edited luxury roster with excellent measurement detail, ideal for the Isabel Marant and Khrisjoy end of the spectrum.

Independent concept stores (my left-field picks)

Goodhood — the Shoreditch independent with a genuinely directional edit; brilliant if you love the unconventional, art-adjacent side of Seletti.
Mouki Mou — a quietly luxurious Marylebone concept boutique full of considered, hard-to-find labels, for when you want something nobody else will be wearing.

The honest bottom line

Seletti is a wonderful place to shop precisely because it pulls so many designers together — but that's exactly why "what size am I at Seletti?" is the wrong question. The right one is "what size am I in this designer?" Get that right, lean on the model measurements, and treat the French and Italian labels as the ones most likely to run small. Do that and you'll spend far more time enjoying the clothes than queueing at the post office with a returns slip — which, take it from me, is the whole point.