Adidas sizing can be frustrating because not every model fits the same.
One pair fits perfectly in your regular size, the next one runs long, and then something like the Samba feels tight before you even lace it up.
If you want the quick answer about how Adidas sneakers fit, here’s what I’d tell you right away:
- Go half a size up in the Adidas Samba
- Go half a size down in the Gazelle and Campus
- Stick with true to size in classics like the Stan Smith, Superstar, and Forum Low.
I put the fast answers in the table below, and after that, I break down exactly whether Adidas sneakers run small, big, or true to size, model by model.
| Adidas Model | How I’d size it |
|---|---|
| Adidas Samba | Go up half a size. – It runs narrow, especially through the midfoot. – If you have wide feet, even a half size up may still feel snug. |
| Adidas Gazelle | Go down half a size. – It fits roomier than the Samba, especially through the midfoot and toe box. – If you have wide feet, true to size can still work. |
| Adidas Stan Smith | True to size for most people. – They can feel a little narrow if you have wide feet. |
| Adidas SL72 RS |
True to size for most people. |
| Adidas AE 1 |
True to size is the best option, even though the fit is a little awkward. |
| Adidas UltraBoost |
Usually true to size, but older pairs can run a bit narrow. |
| Adidas Forum Low | True to size. – Forum Lows fit best in your normal size for most people. |
| Adidas Campus | Go down half a size. – It fits similarly to the Gazelle for me, so I’d make the same move here and size down half a size. |
| Campus Light Bad Bunny | Go down half a size. – True to size feels too roomy, with too much heel slip and extra space in the toe box. |
| Adidas Fear of God 86 Lo |
True to size. |
| Adidas Mad Infinity |
True to size. |
| Adidas BW Army | True to size. – It fits a little tight but also has some heel slippage, so sizing up or down doesn’t really fix the problem. |
| Adidas Harden Volume 8 | True to size. – If you’re getting these to hoop in, your regular size should work well. |
| Adidas Adizero Adios Pro 3 | True to size. – Lockdown is solid, and the fit feels secure in your normal size. |
| Adidas Adizero EVO SL | True to size for most people. – Thin upper has enough room for toe splay. – If you have narrow feet or prefer a snug fit, you could consider going half a size down. |
| Adidas Supernova Rise 3 | True to size. – Toe box feels fairly spacious, but the shoe can feel a little boxy on foot. |
| Adidas Boston | Go down half a size. – Forefoot feels accommodating. – Midfoot is roomier than older versions. |
If you also wear Nike, I break down how Nike sneakers fit in my full sizing guide, where I compare 90+ different models based on real on-foot experience.
Adidas Samba Sizing
The Adidas Samba runs narrow, so for most people, I recommend going half a size up. If you have narrow feet, you might be able to get away with true to size, but compared to most other Adidas sneakers, the Samba feels noticeably tighter, especially through the midfoot.
That’s why I almost always tell people to go up half a size in the Samba. It gives you a better balance of comfort without making the shoe feel sloppy.
If you have wide feet, the Samba honestly may not be the best Adidas sneaker for you. Even after going up half a size, it can still feel too tight. And if you go up a full size, you usually end up with too much empty space in the toe box. So the problem isn’t just the length, it’s the narrow shape of the shoe itself.
In short, the Samba is not very wide-foot friendly. It’s a classic, but the fit can be frustrating if your feet need more room.
The good thing is that most Samba versions fit the same. Whether you’re looking at the Samba Classic, Samba OG, Samba Vegan, Humanrace Samba, or even the Velo Samba, the fit is generally very similar.
My take: go half a size up in the Adidas Samba. If you have narrow feet, true to size can work. If you have wide feet, this probably isn’t your best option.
Now, if you want my full story on how these fit, including collab differences, women’s sizing, break-in period, and how to measure your feet properly, check out my complete Adidas Samba sizing guide, where I go into everything in detail.
Related: Curious how designer shoes fit? Here’s how Balenciaga shoes fit.
Adidas Stan Smith Sizing
The Adidas Stan Smith fits true to size for most people. This is one of the easier Adidas models to size, and for most foot shapes, your regular size should work well.
That said, the Stan Smith can feel a little narrow if you have wide feet. It’s not as tight as the Samba, but it’s still not the most generous fit in the Adidas lineup.
My take: go true to size in the Stan Smith. If you have wide feet, expect a slightly snug fit.
Related: How Should Basketball Shoes Fit, Including Adidas?
Adidas SL72 RS Sizing
The Adidas SL72 RS fits true to size, and that’s what I’d recommend for most people. In my pair, the length felt right, and overall the sizing was pretty straightforward.
The only thing I noticed is that it feels a little tighter through the midfoot than some other sneakers. Even with regular-width feet, I found the fit a bit more snug in the middle of the shoe than what I’m used to in brands like Asics.
So if you have wide feet, going up half a size is worth considering. You probably don’t need to size up automatically, but that extra room can make the shoe more comfortable if you usually struggle with narrower midfoot shapes.
My take: go true to size for most people. If you have wide feet, consider going half a size up.
Adidas AE 1 Sizing
The Adidas AE 1 has awkward sizing, but I still think true to size is the better option. I tried this shoe in both my regular size and half a size down, and honestly, neither one felt perfect.
In my true size, the AE 1 felt a little too long in the toe box. There was more space up front than I wanted, and the shoe definitely looks and feels long on foot.
But when I went down half a size, the fit got way too tight. It wasn’t even close. The shoe became uncomfortable fast, and I knew right away that sizing down wasn’t the answer.
So if you’re choosing between the two, true to size is the safer move. It’s not a perfect fit, but it’s still much better than going half a size down.
The other thing to know is that this shoe is a pain to get on. You really have to loosen the laces, use the pull tab, and sometimes even use a shoehorn. Once it’s on, it’s fine, but the entry is definitely annoying.
My take: go true to size in the Adidas AE 1. Just expect a long toe box and a fit that isn’t as dialed in as it should be.
Related: For anyone curious about how different brands compare, my Air Jordan fit guide is a great follow-up to the Adidas sizing tips. It goes model by model, so you can see how Jordans run and find your perfect size.
Adidas Superstar Sizing
The Adidas Superstar fits true to size. This one is simple. In my experience, your regular size is the right size here.
Compared to other Adidas classics, the Superstar is much easier to size than the Samba, Gazelle, or Campus. It doesn’t have the same narrow feel as the Samba, and it doesn’t run as roomy as models that often work better half a size down.
My take: go true to size in the Adidas Superstar.
Oh, and if you want to see how Thursday sneakers compare on sizing, check out our full Thursday sneaker sizing guide.
Adidas NMD S1 Sizing
The Adidas NMD S1 runs big, so I’d go half a size down. In my pair, it felt noticeably larger than it should have, and I could have easily sized down for a better fit.
If you have long, narrow feet, you might be able to make true to size work. But for most people, I think the shoe just has too much extra room in your regular size.
This is one of those Adidas sneakers I’d definitely try on first if you can. The shape is a little unusual, and the oversized fit can catch people off guard.
My take: go half a size down in the Adidas NMD S1. If you have long, narrow feet, true to size may still work.
Adidas Gazelle Sizing
The Adidas Gazelle fits roomier than the Samba, so I recommend going half a size down. Even though the two shoes look similar, they do not fit the same.
The biggest difference is the shape. The Gazelle has a wider midfoot and a roomier toe box, while the Samba feels much narrower and more restrictive.
That’s why I’d go half a size down in the Gazelle. If you’re used to sizing up in the Samba, the Gazelle can feel surprisingly roomy by comparison.
If you have wide feet, true to size can still work. Because the shoe already has more space through the front and middle, wide-footed wearers usually have an easier time here than they do in the Samba.
Most Gazelle versions fit the same. Whether you’re looking at the Gazelle Indoor, Gazelle Bold, or the regular Gazelle, the overall sizing is usually very similar.
My take: go half a size down in the Adidas Gazelle. If you have wide feet, true to size can still be comfortable.
Adidas Campus Sizing
The Adidas Campus fits similarly to the Gazelle, so I recommend going half a size down. In my experience, the fit is a little roomier than it should be in your regular size, which is why sizing down works better.
That advice usually holds across most Campus versions. Whether you’re looking at the Campus 80s, Campus 2000s, or Campus ADV, the general fit direction stays pretty consistent.
The Campus 2000s can feel even chunkier on foot because of the bulkier build, thicker stripes, and fatter laces, but the sizing advice stays the same.
My take: go half a size down in the Adidas Campus.
Adidas Campus Light Bad Bunny Sizing
The Adidas Campus Light Bad Bunny runs big, so I recommend going half a size down. If you’ve never worn a pair of Campus before, don’t assume your normal size will work here.
In my experience, true to size felt too roomy. I had too much heel slippage and more space than I wanted in the toe box, which made the shoe feel less secure overall.
Once I went down half a size, the fit made a lot more sense. It felt cleaner, more secure, and much easier to wear.
For reference, my size in the Campus Light Bad Bunny is the same as what I wear in Air Force 1s, and it’s half a size smaller than my Adidas Forum Low size.
My take: go half a size down in the Adidas Campus Light Bad Bunny.
Adidas Fear of God 86 Lo Sizing
The Adidas Fear of God 86 Lo fits true to size, even though the shape can feel weird at first. I actually bought two pairs to test the sizing properly: one in my regular size and one half a size up.
In my true size, the shoe felt strange right away. My toes felt more squeezed than I expected, even though I still had some room in front. That sounds contradictory, but the reason is the shape of the toe box. It’s more pointed than most sneakers, so the fit feels tighter than the actual length suggests.
I tried going up half a size, but I wouldn’t recommend it. Once I did that, there was just too much empty room in the front, and the fit became sloppy.
So even though true to size isn’t perfect, it’s still the best option. I also wouldn’t go half a size down, because if the toe shape already feels a little restrictive in your regular size, sizing down will only make that worse.
My take: go true to size in the Adidas Fear of God 86 Lo. Just expect a slightly pointy toe shape that can make the fit feel tighter than it really is.
Adidas Mad IIInfinity Sizing
The Adidas Mad Infinity fits extremely tight, so I would not go true to size. I tried mine in my regular size, and honestly, the fit felt way too cramped.
At minimum, I’d go up half a size. That’s the safest move for most people and the one I’d recommend right away.
If you have wide feet, I’d seriously consider going up a full size. This shoe is already aggressive in shape, and the fit can feel pretty unforgiving, especially if your feet need more room through the forefoot or midfoot.
The only downside is that the Mad Infinity already looks bulky on foot. So if you size up, it’s obviously going to look even bigger. I’m not a huge fan of that, but comfort matters more here because true to size just feels too tight.
My take: go at least half a size up in the Adidas Mad Infinity. If you have wide feet, go up a full size.
Adidas Crazy IIInfinity 2.5 Sizing
The Adidas Crazy Infinity 2.5 fits true to size, and that’s the size I’d recommend. In my experience, your regular size is the best choice here, even though the shoe has a lot of padding and cushioning.
This is one of those bulky Adidas basketball shoes that looks like it should fit tighter than it actually does. But once it’s on foot, true to size feels right.
Even if you have wider feet, I still wouldn’t rush to size up. There’s so much padding and cushioning in this shoe that the fit should relax a bit as everything breaks in. Because of that, I don’t think most people need to go up half a size.
For reference, I went true to size here, even though I usually size up half a size in shoes like the Yeezy 700, Yeezy QNTM, and Yeezy 350. So this one definitely fits differently than a lot of bulkier Adidas models.
My take: go true to size in the Adidas Crazy Infinity 2.5, even if you have slightly wider feet.
Adidas BW Army Sizing
The Adidas BW Army fits a little tight, but I still think true to size is the best option. I bought mine in my regular size, and while the fit is definitely snug, I also noticed a bit of heel slippage.
That’s what makes this one tricky. If I went up half a size, I think the heel slippage would only get worse. But because the shoe already feels a little tight, I also wouldn’t want to go down half a size.
So even though the fit isn’t perfect, true to size still makes the most sense. It gives you the best balance between length and security, even if the shoe feels a little awkward at first.
My take: go true to size in the Adidas BW Army. Just expect a slightly snug fit with some heel slippage.
Adidas Harden Volume 8 Sizing
The Adidas Harden Volume 8 fits true to size. If you’re buying these to hoop in, I’d stick with your regular size.
In my experience, the fit is pretty straightforward here. It doesn’t have the weird sizing issues that some other Adidas basketball shoes can have, so this is one of the easier performance pairs to get right.
My take: go true to size in the Adidas Harden Volume 8.
Adidas Forum Low Sizing
The Adidas Forum Low fits true to size. This is another Adidas model where the sizing is simple and easy to get right.
In my experience, your regular size gives you the best fit here. It doesn’t run especially narrow or overly roomy, so most people should be perfectly fine sticking with their usual size.
My take: go true to size in the Adidas Forum Lows.
Adidas UltraBoost Sizing
The Adidas UltraBoost usually fits true to size, but some older versions can run a little narrow. In my experience, a lot of the newer UltraBoost models fit just fine in your regular size, but older pairs like the UltraBoost 1.0 can feel tighter than expected.
If you’re buying one of the older UltraBoost releases, you may want to go up half a size. That extra room can make a difference, especially if you have wider feet or you prefer a less snug fit through the forefoot.
My take: most newer UltraBoosts are true to size, but older versions like the UltraBoost 1.0 may fit better half a size up.
Related: Sneaker Width Chart
Adidas Adizero Adios Pro 3 Sizing
The Adidas Adizero Adios Pro 3 fits true to size. If you’re buying this one for running, I’d stick with your regular size.
The lockdown is one of the better parts of the fit. It holds the foot securely and feels nicely dialed in, which is exactly what you want from a fast race-day shoe.
My take: go true to size in the Adidas Adizero Adios Pro 3.
Adidas Adizero EVO SL Sizing
The Adidas Adizero EVO SL has a surprisingly forgiving fit, especially for a lightweight running shoe.
The upper is very thin, and I think that changes the fit more than you’d expect. Because the material is so minimal, your foot gets a bit more freedom instead of feeling boxed in.
For me, wide-footed runners should be fine going true to size. I don’t think this is one of those Adidas running shoes where you automatically need to go up half a size.
There’s enough volume through the upper, and the thin build gives your toes enough room to splay naturally while running.
Your foot can expand without the shoe feeling restrictive, which is exactly what I want in a lightweight trainer like this.
If you plan to wear the EVO SL casually, I’d still say true to size works best for most people, especially if you have wide feet or you just like a little extra room.
It doesn’t feel sloppy or oversized, but it does have enough space to stay comfortable.
If you have narrow feet or you prefer a snugger fit, then going down half a size is worth considering.
I’m definitely not swimming in my regular size, but I can see how some people who like a tighter, more dialed-in fit might prefer that half-size-down option.
Adidas Supernova Rise 3 Sizing
The Adidas Supernova Rise 3 fits true to size, but it definitely has a roomy, slightly bulky feel on foot. Right away, the toe box feels fairly spacious, and overall, the shoe comes across a little boxier than a lot of other daily trainers.
In my experience, true to size is still the right move, but don’t expect a super sleek or locked-in fit.
Compared to other shoes in the same size, the Supernova Rise 3 can feel a bit bigger on foot.
That extra room isn’t necessarily a bad thing, especially if you like a more relaxed fit, but it does make the shoe feel a little clunkier than something more streamlined.
The one area that stood out to me was the heel lockdown. It’s not bad, but it’s also not especially secure.
That’s why I’d strongly recommend using a runner’s loop with this shoe. That extra lace lock makes a noticeable difference and helps hold your heel in place much better.
I actually don’t mind shoes that feel a little bigger on foot, as long as I can lock them down properly. And that’s exactly how I feel here.
Once I use the runner’s loop, the fit feels much more secure and the shoe works better overall.
Adidas Boston Sizing
The Adidas Boston has a more accommodating fit than some people might expect, especially through the forefoot.
Even though Adidas doesn’t offer multiple width options here, the front of the shoe feels nicely open, with enough room for a lot of foot shapes.
What stood out to me most is that the newer version feels roomier through the midfoot than the previous model.
That extra space makes a real difference, especially if you found older Boston versions a little too snug or restrictive. I think that change will make this shoe work better for a lot more runners.
That said, I would still recommend going half a size down. In my case, dropping down half a size gave me the best fit by far. Once I did that, the sizing felt spot-on and much more dialed in.
So even though the shoe has a fairly generous shape up front and a bit more room through the middle, I still wouldn’t stay in my usual size.
Half a size down gave me the perfect balance of comfort and security.
Final thoughts
If you’re still wondering how do Adidas sneakers fit, the biggest takeaway is simple: there is no one-size-fits-all answer with Adidas.
Some models fit perfectly true to size, some clearly run narrow, and others feel roomy enough that sizing down makes more sense.
If I had to simplify it, I’d say this: go half a size up in the Samba, go half a size down in roomier pairs like the Gazelle, Campus, NMD S1, and Boston, and stick with true to size in models like the Stan Smith, Superstar, Forum Low, UltraBoost, Adizero Adios Pro 3, and most of the basketball shoes.
That’s exactly why I always tell people not to assume every Adidas sneaker fits the same. A Samba and a Gazelle may look similar, but they absolutely do not fit the same.
The same goes for Adidas running shoes too. Some feel snug and performance-focused, while others feel surprisingly roomy or even a little boxy on foot.
If you want the best chance of getting the right size the first time, look at whether the model runs narrow through the midfoot, roomy in the toe box, or bulky through the heel, because that matters just as much as length.
My honest advice is don’t buy Adidas based on brand loyalty alone. Buy based on the specific model. That’s the only way to get the fit right.
If you’ve tried any of these Adidas sneakers yourself, I’d love to hear how they fit for you. And if you’re still stuck between sizes, drop your foot shape and the model you’re looking at, and I’ll tell you what I’d do.