Bought a size 38 once assuming it'd match my usual medium. Wrong move — ended up in something two inches too long and I didn't even realize why until I actually looked at the size chart properly. Acne Studios uses its own numbered sizing system instead of the standard S/M/L most people default to, and that trips up a ton of first-time buyers. This breaks the chart down properly — what the numbers mean, how they map to US and UK sizes, and where people usually mess up when converting. Quick answer up front: Acne sizes run on European numbering (34-46 roughly), and a size 38 is closest to a men's medium, but the fit runs slightly boxier than a normal medium so a lot of people size down if they want something less oversized.

Why Does Acne Use Numbers Instead of Letters

European sizing convention, mostly. A lot of Scandinavian and continental brands number their sizes rather than using S/M/L, and  acneestudio.com that system across their whole hoodie line rather than converting to something more familiar for US shoppers.It's not complicated once you know the conversion, but nobody tells you that upfront. The numbers roughly track chest measurement in a way letter sizes don't communicate as clearly — a 40 is bigger than a 38, obviously, but by how much isn't intuitive unless you've seen the actual chart.

The Full Size Conversion Chart

Here's the breakdown, standard sizing across most core hoodie styles:

Worth noting — these numbers can shift slightly between men's and women's lines, and even between collections within the same year. Always check the specific product page rather than assuming last season's chart applies exactly.

How Do I Know If I Should Size Up or Down

Depends what look you're going for, honestly, more than what your "normal" size is. If you want the classic oversized Acne silhouette — the one that shows up in basically every street style photo — sizing up one number from your usual is the move.Want something closer to a regular fit, less swimming in fabric? Stick to your true size or even size down slightly, especially if you're on the shorter side since the length can overwhelm smaller frames. I've made both mistakes at different points, for what it's worth — sized up once and looked like I borrowed my dad's hoodie, sized true-to-size another time and it fit exactly how I wanted.

Does the Fit Vary Across Different Hoodie Styles

Yes, and this is where the chart alone doesn't tell the whole story. A heavyweight Face-logo hoodie runs boxier at the same labeled size compared to a lighter terry-knit piece, which sits closer to the body even at identical numbers on the tag.Limited or archive drops sometimes deviate from standard sizing entirely too — I've seen archive pieces from earlier collections run noticeably smaller than what the current chart would suggest for the same number. If you're buying something older or rerelased, checking actual garment measurements matters more than trusting the printed size.

What If I'm Between Two Sizes

Here's a real, practical answer: go with the larger size if you want the oversized aesthetic most people buy Acne hoodies for in the first place. The brand's whole design language leans into that roomy, drop-shoulder look, so erring larger rarely looks wrong.Go smaller only if you specifically want a cleaner, less bulky silhouette or plan to layer heavily underneath — extra bulk plus an already-oversized hoodie can get overwhelming fast, especially on smaller frames.

Measuring Yourself Before You Buy

Skip the guesswork if you can. Grab a soft tape measure and check these three spots:

1. Chest — measure around the fullest part, under the arms

2. Shoulder width — across the back, seam to seam

3. Desired length — where you actually want the hem to sit, not just what feels "normal"

Compare those numbers against the chart above rather than relying on your usual size from other brands. Acne's proportions genuinely don't match most mainstream sizing, so cross-referencing your regular size elsewhere doesn't translate cleanly here.

Common Sizing Mistakes People Make

A few patterns show up over and over in return complaints and forum threads:

• Assuming Acne numbering matches EU shoe or pants sizing (it doesn't, different scale entirely)

• Buying based on a friend's recommendation without checking their body type against your own

• Ignoring the length measurement and focusing only on chest width

• Ordering the same size across completely different hoodie styles instead of checking each product page

That last one gets people more than you'd think. Just because a 38 fit perfectly in one drop doesn't guarantee the same in another, especially between fleece and terry constructions.Measure yourself against the chart above before ordering, and check the specific product page for that exact style rather than assuming your usual Acne size carries over  the numbering system is consistent, but the fit underneath it shifts more than people expect.