Infinity Leather Sizing: Does It Run True to Size

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

Infinity Leather runs true to size, but with a notably slim and structured fit — so if you’re between sizes, curvy, broad-shouldered, or planning to wear layers underneath, sizing up is almost always the right call. I’ve tried enough leather jackets over the years to know that ‘true to size’ means very different things depending on the brand, and with Infinity Leather, it really does mean close-fitting. This isn’t a criticism — it’s just the nature of their design philosophy, and once you know it, you can shop them with complete confidence.

What Is Infinity Leather?

Infinity Leather is a UK-based brand specialising in genuine leather and suede outerwear — biker jackets, bombers, blazers, shearling coats, and leather trousers. Their pieces are crafted from real materials (nappa lambskin, cowhide, suede, shearling) at prices that sit well below the designer tier. Think of them as sitting between high street and luxury: you’re getting proper leather craftsmanship without the Acne Studios price tag. For that reason, getting the size right first time really matters — this is not a “guess and return” type of purchase.

The Three Fit Types — This Is Where It Gets Important

One thing that makes Infinity Leather slightly different to most brands is that they actually label their jackets by fit type. This is genuinely helpful, but only if you know what each one means in practice:

Slim Fit — This is close-cut and body-conscious. If you have a curvier frame or like any ease of movement, I’d go up a size from your usual. Slim here genuinely means slim.
Tailored Fit — Sits between slim and regular. Still structured and smart-looking, but with a touch more room through the waist and bust. Often the most flattering option for a range of body shapes.
Regular Fit — The most forgiving of the three. Better for layering a chunky knit underneath, and a great choice if you run between sizes.

Each fit has its own size guide on the Infinity Leather website, which is based on chest measurement rather than a generic S/M/L. Always use your bust measurement, not your usual dress size — the two can vary significantly, especially if you’re broader across the shoulders or fuller on top.

Does Infinity Leather Run Big or Small?

Based on customer feedback and the brand’s own sizing data, Infinity Leather runs true to size on paper but feels snug in practice — particularly the slim and tailored styles. I’ve seen this pattern come up again and again: customers ordering their usual size and finding it a touch tight across the bust or shoulders. It’s not a major vanity sizing situation, but it’s consistent enough to flag.

The key thing to remember with any genuine leather jacket is that it simply will not give. Denim softens, cotton stretches, knitwear moulds to your body over time — but real leather stays exactly as it is. That means if it’s tight on day one, it’ll be tight on day one hundred. There’s no wearing-in magic with leather. Getting the right size at the point of purchase is everything.

Sizing by Style — What to Expect

Not all Infinity Leather pieces fit the same, even within the same fit label. Here’s what I’ve found works best by style:

Biker Jackets — These are the snuggest. The cropped length and structured shoulders mean even a centimetre off can feel uncomfortable. Measure your bust carefully and if you’re on the boundary, go up.
Bomber Jackets — Built with slightly more room through the chest and arms. Easier to size, and better suited to layering a hoody or thick jumper underneath. These are the most forgiving style in the range.
Leather Blazers — Structured and close-fitting. Infinity’s blazers have a smart, tailored silhouette that works beautifully when it fits well — but goes wrong quickly if it’s too tight across the back. Again, chest measurement is your friend here.
Shearling & Aviator Coats — The most forgiving in the range. Warmer, heavier, and with a naturally more relaxed fit. Sizing up is still advisable for winter layering, but these won’t punish you for a small error.

My Honest Advice on Sizing Up

If any of the following apply to you, I’d recommend going up a size from your usual:

You have a fuller bust or broader shoulders
You plan to wear a knit, hoodie, or thick shirt underneath
You’re choosing a slim fit or tailored fit style
You prefer a slightly relaxed silhouette rather than a second-skin fit
You fall between two sizes on the chest measurement chart

I’ll be honest — I once ordered a leather biker jacket based on my regular dress size without measuring first, and it was one of those “technically fits but feels like a corset” moments. Lesson learned. With a leather jacket especially, always measure your bust before you buy. It takes thirty seconds and saves a lot of faff.

Alternatives to Infinity Leather — High Street & Beyond

If you love the leather jacket look but want to compare options before committing, here are my picks across different price points:

All Saints — The gold standard for high street leather jackets. Their Balfern biker is a genuine classic, and sizing tends to be more generous than Infinity Leather.
Mango — Brilliant faux leather options at a fraction of the price. Consistently well-reviewed for fit, and their sizing is fairly reliable across styles.
Zara — Season after season, Zara produces some of the best-looking leather and faux leather pieces on the high street. Check size reviews per product, as sizing can vary.
Reiss — For a more polished, grown-up leather jacket with superb finishing. Sits at a higher price point but the quality justifies it.
Whistles — Understated, beautifully cut leather and faux leather styles. Tends to size slightly more generously, which is helpful if you find Infinity runs tight.
Massimo Dutti — Exceptional quality leather outerwear that’s frequently overlooked. Classic cuts, real leather options, and sizing that feels true and consistent.
Me&Em — A favourite of mine for leather jackets that feel genuinely premium without being designer. Their Luxe Leather Biker is outstanding and the fit is spot on.
Ted Baker — Elegant leather pieces with a feminine edge. Better for the leather blazer or smart coat look than a full moto biker style.

Two Independent Picks Worth Knowing About

Deadwood — A Swedish brand making leather jackets from upcycled and deadstock leather. Every piece is unique, the quality is exceptional, and the sustainability credentials are genuinely impressive. Not easy to find but worth hunting down.
Nour Hammour — A Paris-based independent label producing some of the most beautifully crafted leather coats and blazers around. Beloved by stylists, quietly cool, and an absolute treat if you want something genuinely special.

Never Get Your Size Wrong Again — Use Tellar

Here’s the thing: Infinity Leather’s fit nuances — slim vs tailored vs regular, chest-based sizing, the snug biker vs the roomier bomber — are exactly the kind of detail that’s easy to get wrong when you’re shopping online. That’s precisely what Tellar.co.uk was built for.

Tellar is the UK’s leading free sizing tool — enter your measurements once and instantly get your correct size across 1,500+ women’s brands. Not a generic size converter. Not a guess. Your actual measurements matched against each brand’s real sizing data.

Measure once — bust, waist, hips, or use an existing brand size as your starting point
Use the Store Size Lookup tool — get your precise size in Infinity Leather, All Saints, Reiss, Me&Em, and hundreds more
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Plus, the Tellar Fashion Hub is a completely free library of 5,000+ honest, unsponsored fashion articles written by our in-house stylists. No ads. No sponsored posts. No bias. Just genuinely useful fashion advice.

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Infinity Leather Sizing: Does It Run True to Size — and What Should You Buy?