What Is Sizing Like at One Teaspoon Clothing?

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

One Teaspoon runs small — often by a full size, sometimes two — and their denim in particular is notoriously tight through the waist and hips, so sizing up is almost always the right call here. If you're a UK 10, start with a UK 12. Seriously. Don't say I didn't warn you.

Who Is One Teaspoon?

Founded in Sydney in 2000, One Teaspoon has become something of a cult denim brand — particularly beloved for their denim shorts, relaxed-fit jeans, and boho-rock separates. If you've ever spotted someone at a festival looking impeccably dishevelled in perfectly cut-off denim, there's a reasonable chance they're wearing One Teaspoon. The brand has a very distinct visual identity: vintage-inspired, effortless, a little bit rock 'n' roll. Their most iconic pieces — the Bandits shorts and the Awesome Baggies — have genuine cult status and a loyal following that transcends seasons and trends. Prices sit roughly between £60 and £180 for most pieces, with denim at the higher end of that range.

So Why Does One Teaspoon Run Small?

A few reasons. First, the brand is Australian, and whilst Australian sizing broadly aligns with UK sizing, One Teaspoon has historically cut their denim with a slim, close-to-the-body fit in mind — particularly through the waist. Second, denim itself doesn't forgive in the way that jersey or stretch fabrics do. Their raw and rigid denim styles have virtually no give at all when you first get them, meaning even a single size difference can be the difference between comfortable and thoroughly miserable. Third — and this is a real one — the brand's aesthetic is built around a certain relaxed, low-slung, slightly oversized look. If you order your true size in their baggies or wide-leg styles, the effect can actually look too fitted and miss the point entirely. Sizing up gives you the drape and the proportion the brand is going for.

One Teaspoon Sizing: Garment by Garment

Denim shorts (Bandits, etc.) — size up one, possibly two if you're fuller through the hips or thighs. The waistband in these is notoriously unforgiving. Check your hip measurement against the size guide every single time — do not rely on your usual denim size.
Jeans (Awesome Baggies, wide-leg styles) — size up at least one. The relaxed, low-slung fit actually looks better with a little room in it. If the waist is loose, a simple belt is your friend. If the hips are too tight, nothing will save you.
Straight and slim-leg jeans — these run particularly small. I'd strongly suggest going up one to two sizes and using the waist tie or belt to adjust if needed. Customer reviews consistently flag this across styles.
Dresses and tops — slightly more forgiving than the denim, but still on the small side. Size up by one as a starting point.
Knitwear and jersey pieces — the most relaxed category in their range. True to size is usually fine here, but check the specific fabric content before ordering.

Bottom line: treat One Teaspoon sizing the way you'd treat buying vintage. Go by the measurements, not the label. Their own size guide on the website is actually more reliable than most — use it, and use it every time.

One Teaspoon Size Conversion Table

One Teaspoon LabelUK SizeUS SizeEU SizeWaist (inches)Hips (inches)2462342434256/82/434/3625352684362636278/104/636/382737281063828382910/126/838/402939301284030403112/148/1040/423141321410423242

One Teaspoon labels their denim in numerical waist sizes (24–32) rather than UK dress sizes, which catches a lot of people out. Use your actual waist measurement in inches as your starting point — and then, as always, size up one from there for their denim cuts.

My Practical Tips for Shopping One Teaspoon

Measure your waist and hips before you order — every time. Their numerical sizing means there's no ambiguity if you know your actual inches. Don't guess.
Read the reviews for that specific style. One Teaspoon has a wide range of cuts and some run smaller than others even within the denim category. Their customer reviews are genuinely helpful and specific.
Factor in the wear-in period for raw denim. If you order a pair that feels snug (but not painful), raw denim will loosen and mould to your shape over the first few weeks of wearing. A little snug at purchase can become perfect after a month. A lot snug is just a lot snug.
Plan your proportions around the waist. If you've sized up for your hips and the waist is loose, a slim belt tucked through the loops is not a compromise — it's genuinely part of the One Teaspoon aesthetic. Low-slung, belted, slightly undone. Own it.

Brands With a Similar Aesthetic — And How They Size

If the One Teaspoon vibe is your thing but you want to shop wider — or need pieces in a size range they don't carry — these are the brands I'd point you towards:

High Street Options

Anthropologie — probably the closest high street spirit match to One Teaspoon. Boho-leaning, vintage-inflected, quality fabrics, and a curated range of denim and separates with real personality. Their sizing is true to UK size and they carry an extended range. Consistently one of the best high street options for this aesthetic.
All Saints — if you want the rock-influenced edge of One Teaspoon translated into a more polished, city-ready wardrobe. Their denim and leather pieces are excellent. Sizing is true to UK and reliably consistent.
Mango — brilliant for boho-inflected denim and relaxed separates at a very accessible price. Their wide-leg and straight-leg jeans have been consistently well-reviewed and tend to run true to size, which is a relief after One Teaspoon.
Hollister — underrated for relaxed, vintage-inspired denim at a low price point. Their low-rise and wide-leg cuts are particularly strong right now and run fairly true to size.
Abercrombie & Fitch — has quietly become one of the better high street destinations for quality denim in the last few years. Their 90s straight, vintage stretch, and low-rise cuts have had genuinely strong reviews from both customers and style press. True to size and consistent.
Urban Outfitters — always worth checking for boho, vintage-style pieces that speak the same language as One Teaspoon. Their own-label denim and co-ords hit a similar aesthetic note at a lower price. Sizing runs slightly relaxed, so you may find you're actually a size down from your usual here.
Levi's — the denim heritage brand that nobody should overlook when talking about vintage-inspired jeans. Their 501s, 505s, and Ribcage styles are wardrobe classics for a reason, and the quality is exceptional at the price point. Use their waist-and-leg size system for the most accurate fit.
Zara — worth a look for trend-driven denim and boho separates that refresh regularly. Their denim quality has improved considerably in recent seasons, and they're one of the fastest brands to translate runway denim trends into accessible pieces. Sizing can run small, particularly in jeans — size up if in doubt.

Two Independent Picks Worth Your Attention

Nudie Jeans — a Swedish independent denim brand that I recommend to anyone serious about the vintage-denim, wear-it-in aesthetic. Every pair comes with a free repair service for life, and the quality of their organic denim is exceptional. They size in waist-and-leg measurements like One Teaspoon, so use your actual inches. The fit is more structured than One Teaspoon but the philosophy — denim as a living, evolving garment — is entirely aligned.
Boyish Jeans — a California-based sustainable denim brand with a strong vintage cut ethos and brilliant credentials on both ethics and style. Their cuts are relaxed and thoughtfully proportioned, with a cool-girl aesthetic that sits comfortably alongside One Teaspoon in any wardrobe. Sizing is true to US size — add 4 to get your UK equivalent — and the fit is consistently praised in customer reviews for being generous and realistic.

🎯 One Teaspoon Sizing Sorted — With Tellar

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The Tellar Fashion Hub is also home to hundreds of honest, unsponsored posts covering everything from brand-by-brand fit guides to body shape dressing, the best seasonal buys, and wardrobe strategy. Written by stylists. Always free. Never influenced by who's paying.