What Is Sizing Like at Xirena? Your Complete UK Fit Guide

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

Xirena sizes true to size overall, but with a deliberately relaxed, boyfriend-influenced fit — so if you prefer something more structured, sizing down by one is your safest move.

I first discovered Xirena on a trip to New York a few years back, completely by accident. I spotted a woman in a coffee shop wearing the most beautifully worn-in white shirt — effortless in that annoying way that took me about thirty seconds to obsess over. It was, of course, Xirena's Beau Shirt. I bought one on the spot, sized down from my usual, and honestly it's still one of my most-reached-for pieces. I've also made the mistake of buying a dress in my regular size without reading the fit notes properly, and ended up swimming in it. Lesson learned — and the reason I'm writing this for you.

The Brand in Brief

Founded by Deirdre Roffoni and made in Los Angeles, Xirena (pronounced suh-ren-uh — yes, really) takes its name from the Spanish word for mermaid. The brand draws from California's free-spirited seventies energy and the bohemian coastal vibe of Formentera, Spain. Think soft cotton poplin shirts, floaty tiered dresses, easy loungewear, and relaxed blouses — all made in rich, earthy tones and prints that feel like they belong on a sun-drenched terrace somewhere. It's premium but wearable, special but not precious. The kind of brand that works just as hard with sandals and sunglasses as it does dressed up with heels.

Xirena Size Guide: UK, EU & US Conversions

Xirena uses US sizing from XS to XL. Here's how that maps across to UK and EU sizes, along with approximate body measurements:

A note on fit: Xirena's size range runs XS to XL. If you sit between sizes, the brand's relaxed silhouettes generally mean you'll be happier sizing down rather than up — especially on the shirts and blouses.

Fit Breakdown by Garment Type

Shirts & Blouses

This is where Xirena really lives. The iconic Beau Shirt and the Channing Shirt are cut with what the brand calls a "borrowed from the boys" fit — there's real volume through the chest and shoulders. Retailers consistently note that these fit true to size, but if you're narrow across the shoulder or prefer a more tailored look, size down. I wear a UK 10 and bought an XS — it's perfect. Anything bigger and it tips from deliberately oversized into just messy.

Dresses

The tiered and smocked dresses have elastic waists, which gives you far more flexibility — these tend to be the most forgiving pieces in the range. If you're between sizes here, stay in your regular size and let the gather do its job. The more structured slip-style dresses, however, follow the shirt logic: check the bust measurement carefully and don't be afraid to size down if you want definition.

Tops & Lightweight Blouses

The lighter tops — the gauzy, poplin styles — run relaxed but not dramatically oversized. True to size works well here. If you carry your weight through the hips rather than the bust, these pieces are a dream; they skim rather than cling.

Fabric & Care Notes

Most Xirena pieces are 100% cotton — poplin, gauze, twill, or cotton voile. This is brilliant in terms of feel and breathability, but it does mean you need to be careful in the wash. Machine cold and tumble dry low is the official guidance, but honestly I'd air-dry anything you love. Cotton poplin can lose its crispness with too many hot washes, and Xirena's softer gauze pieces will shrink a little if you're not careful — worth bearing in mind if you're debating between two sizes.

Similar Brands to Xirena — Where to Shop in the UK

Xirena is stocked by a handful of boutiques but isn't widely available on the UK high street, so it helps to know where else to look for that same effortless, boho-with-a-backbone energy. Here's where I'd send you:

High Street & Mid-Market Picks

Anthropologie — The closest high-street match to Xirena's boho sensibility. Flowing blouses, printed dresses, and beautiful cotton tops. Reliable quality and the sizing is fairly true to label.
Mango — Consistently delivers Mediterranean-inspired pieces with strong fabric quality at a sensible price point. The linen and cotton shirting is worth a look every season.
Hush — Understated, wearable basics with a British softness to them. Great for those who love Xirena's relaxed silhouettes but want something a touch more pared back.
Me&Em — Polished but effortless, strong on cotton shirting and easy dresses. Sizing is UK-standard and consistent, which is always reassuring.
White Stuff — Brilliant for printed cotton pieces and relaxed weekend dressing. The prints are more playful than Xirena but the spirit of ease is similar.
Urban Outfitters — A good source for boho-inspired basics and the occasional piece that channels that same California-cool energy without the price tag.
Oliver Bonas — Lovely for occasion dresses and printed blouses. Underrated for this aesthetic, and the quality is solid for the price.

Independent Picks

Rue Stiic — An Australian label with a devoted following for good reason. Floaty midi dresses, cotton shirting, and easy separates with exactly the same sun-bleached, coastally-inspired DNA as Xirena. Less well-known over here but increasingly stocked by boutiques and Net-a-Porter.
Cleobella — A California-based independent brand whose bohemian cotton pieces and artisan prints feel cut from the same cloth as Xirena, literally and figuratively. Well worth a browse if you're shopping online.

Premium Options

Ulla Johnson — Romantic, artisanal, and deeply considered. If Xirena is your entry point into this aesthetic, Ulla Johnson is the natural next step up.
Faithfull the Brand — Premium Australian label, beautiful vintage-inspired prints, strong on cotton and linen. Sits in a similar world to Xirena but with a slightly more structured approach.

Luxury

Zimmermann — If Xirena is the California dream, Zimmermann is the Australian Riviera version. Extraordinary craftsmanship, beautiful embroidery, and the kind of pieces that last a lifetime. A genuine treat if the budget allows.

Find Your Exact Xirena Size — Free, Instant, No Guesswork

Xirena's relaxed fits and US sizing can make it genuinely tricky to know where you land — especially shopping online. That's exactly what Tellar.co.uk is built for.

Measure once — bust, waist, and hips — or just enter your size in a brand you already know
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