Adidas Yeezy QNTM Quantum Size Chart & Review


This is the Adidas Yeezy Quantum size chart for men, women, kids, youth, and teens.

When the Adidas Yeezy Quantum first leaked, it was thought that there was only one pair that would be releasing.

Then it was found out that the NBA actually banned that pair because of all the 3M on the upper.

Then at the end of 2019 or maybe the beginning of 2020, we found out that there might actually be two different versions of this shoe releasing, one being a lifestyle version and the other being a performance basketball version.

Without further ado, let’s get right into the size chart…


Adidas Yeezy Quantum Size Charts

Men’s Yeezy Quantum Size Chart

Men Yeezy
US Size
Heel – Toe
in Inches
Heel – Toe
in cm
Yeezy UK
Yeezy EU
48.7″22.1 cm3.536
4.58.9″22.5 cm436 2/3 *
59.0″22.9 cm4.537 1/3 *
5.59.2″23.3 cm538
69.4″23.8 cm5.538 2/3 *
6.59.5″24.2 cm639 1/3 *
79.7″24.6 cm6.540
7.59.8″25.0 cm740 2/3 *
810.0″25.5 cm7.541 1/3 *
8.510.2″25.9 cm842
910.4″26.3 cm8.542 2/3 *
9.510.5″26.7 cm943 1/3 *
1010.7″27.1 cm9.544
10.510.9″27.6 cm1044 2/3 *
1111.0″28.0 cm10.545 1/3 *
11.511.2″28.4 cm1146
1211.3″28.8 cm11.546 2/3 *
12.511.5″29.3 cm1247 1/3 *
1311.7″29.7 cm12.548
13.511.9″30.1 cm1348 2/3 *
1412.0″30.5 cm13.549 1/3 *
14.512.2″31.0 cm1450
1512.4″31.4 cm14.550 2/3 *
1612.7″31.8 cm1551 1/3 *
1713.0″32.6 cm1552 2/3 *
1813.3″33.5 cm1753 1/3 *
1913.7″34.3 cm1854 2/3 *
2014.0″35.2 cm1955 2/3 *

Women’s Yeezy Quantum Size Chart

Women Yeezy
US Size
Heel – Toe
in Inches
Heel – Toe
in cm
UK Yeezy
EU Yeezy
58.7″22.1 cm3.536
5.58.9″22.5 cm436 2/3 *
69.0″22.9 cm4.537 1/3 *
6.59.2″23.3 cm538
79.4″23.8 cm5.538 2/3 *
7.59.5″24.2 cm639 1/3 *
89.7″24.6 cm6.540
8.59.8″25.0 cm740 2/3 *
910.0″25.5 cm7.541 1/3 *
9.510.2″25.9 cm842
1010.4″26.3 cm8.542 2/3 *
10.510.5″26.7 cm943 1/3 *
1110.7″27.1 cm9.544
11.510.9″27.6 cm1044 2/3 *
1211.0″28.0 cm10.545 1/3 *
12.511.2″28.4 cm1146
1311.3″28.8 cm11.546 2/3 *
13.511.5″29.3 cm1247 1/3 *
1411.7″29.7 cm12.548
14.511.9″30.1 cm1348 2/3 *
1512.0″30.5 cm13.549 1/3 *
15.512.2″31.0 cm1450

Kids’ Yeezy QNTM Size Chart

Kids Yeezy
4 – 7 yrs US Size
Heel – Toe
in Inches
Heel – Toe
in cm
UK Yeezy
EU Yeezy
10.5K6.5″16.6 cm10K28
11K6.7″17.0 cm10.5K28.5
11.5K6.9″17.4 cm11K29
12K7.0″17.8 cm11.5K30
12.5K7.2″18.3 cm12K30.5
13K7.4″18.7 cm12.5K31
13.5K7.5″19.1 cm13K31.5
17.7″19.5 cm13.5K32
1.57.9″20.0 cm133
28.0″20.4 cm1.533.5
2.58.2″20.8 cm234
38.3″21.2 cm2.535

Youth & Teens Size Chart

Youth & Teens Yeezy
8 – 16 yrs US Size
Heel – Toe
in Inches
Heel – Toe
in cm
UK Yeezy
EU Yeezy
3.58.5″21.6 cm335.5
48.7″22.1 cm3.536
4.58.9″22.5 cm436 2/3 *
59.0″22.9 cm4.537 1/3 *
5.59.2″23.3 cm538
69.4″23.8 cm5.538 2/3 *
6.59.5″24.2 cm639 1/3 *
79.7″24.6 cm6.540
7.59.8″25.0 cm740 2/3

Adidas Yeezy Quantum Review

We knew the Quantum was coming for years but we didn’t know when and we didn’t know where.

There had been rumors for months that this shoe was going to release during All-Star weekend 2020 for a couple of reasons.

Firstly, it’s technically a basketball sneaker and All-Star weekend is a basketball even. Secondly, Kanye West is from Chicago and that’s where the All-Star weekend was being held.

The mere fact that the Adidas Yeezy QNTM was released at all during All-Star weekend was probably a surprise to most people, but I don’t think anyone could have anticipated the PR stunt that went along with its release.

On the Friday of the QNTM’s release, Kanye took to the streets of Chicago in those tanks and actually handed out pairs to people on the street.

Then, after that crazy PR stunt on Friday, Adidas officially launched the shoe on Sunday, February 16th exclusive to Chicago.

Let’s move to the sizing of the Yeezy Quantum… 

Sizing & Fit

The fit of the Yeezy QNTM is a little bit funky because the original QNTMs that were released in Chicago only came in whole sizes and no half sizes.

I’m a size 9 and I really feel it fits exactly true to size or a little bit small. For me, being a whole size person, I really only have one option. I have to go with a size 9 because a size 10 would be too big and a size 8 would be way too small.

As for people with half-size feet, you might actually have things a little bit better because you can either go with half a size down or half a size up.

I wouldn’t recommend going a size down, but you can if you want to.

I don’t know why Adidas had so much trouble with the fit of this shoe, but it’s kind of frustrating, and unfortunately, you don’t have too many options.

Adidas and Yeezy then fixed this half issue with the Barium colorway. So, the Yeezy Quantum Barium does seem to fit pretty much exactly the same as the previous Yeezy QNTM except now, they offer half sizes.

I went true to size and I’m pretty happy with it and that’s what I would suggest you doing as well and again, it makes it a lot easier when you can actually grab a half size if you are a half size.

Width & Length

The width of the QNTM is fine and the issue is only with the length. Because the toe comes down to such a point that was too narrow for me, it was also a bit too short.

If you’re a whole size, it’s fine and it’s workable. It’s not going to be uncomfortable, but I definitely feel like I would have benefited from a little bit more length.

Again, if you’re a half size, I would definitely go up to a size 10 if you’re 9.5 and it might even fit you better than a size 9 fits me.

Let’s get to one of the most frustrating details on the Yeezy Quantums and that’s the heel counter…

Related: Puma vs Adidas

Heel Counter


There’s something about the heel portion that really reminds me of the Yeezy Scuba sneakers which never came out and probably never will never come out.

It makes me wonder if Kanye was trolling us or maybe that he was testing out the internals of a different shoe. I have no idea.

The entire heel counter is made up of a hard sort of plasticky TPU and actually runs over on to the midsole itself. Not only that but actually the entire heel counter is covered in 3M.


Obviously, this silver portion has more 3M sprayed so it glows brighter, but the entire heel panel is covered in 3M of some kind.

This is also a huge heel counter which spills over on to the midsole. It does provide a lot of heel support, which is a good thing, but there are some details about it like flexibility that are kind of concerning…

Heel Counter Flexibility

This plastic material on the heel counter just can’t flex that much especially not as much as the rubber that’s on the midsole.

I think, over time, it might eventually crack, which isn’t a good thing. I could be wrong about that, but that corner where the heel counter and the midsole meet is a little bit concerning and it really doesn’t seem to be attached to the shoe any other way than just glue.

Related: Chanel Shoe Size Chart

Heel Counter Visual Flaw


The way that this heel counter is designed makes the QNTM visually look like there’s four different panels that all come together at one point.

However, they’re not lined up. In the original leaks of this shoe, they were lined up and they created sort of an X shape.

However, in the new images that came out of this shoe and obviously in the production version of this shoe, it’s off. It’s not off by a consistent margin but it’s always different in each shoe.

It just looks weird and it looks bad and I just don’t like it.

I’m sure in the factory, it’s almost impossible to line them up perfectly every single time. The upper is sewn and the heel counter is glued and it’s just really hard to match them all up.

But if that is the case, don’t design something that can’t be manufactured right. It’s little details like that that seem a little careless.

Last but not least, you’ll notice that there’s no pull tab to pull the sneaker on. You just kind of pull it from the sides of the ankle.


Even though there isn’t an insane amount of Boost, the QNTM is still a pretty comfortable sneaker. It’s also a very stable sneaker not only because the Boost is encased, but also because it’s a very wide base.

The underfoot comfort of this shoe is fine and not that amazing. It’s pretty comparable to what you get in the 350 V2. It’s maybe a little less soft but it’s not noticeably so.

As I mentioned before, the majority of the upper isn’t padded and only the heel area is. So, I would say that the overall comfort of the Adidas Yeezy Quantum is good but not incredible.

Related: Alexander McQueen Sizing Chart

Yeezy Quantum Lifestyle vs Basketball

When the Adidas Yeezy Quantum first leaked, it was thought that there was only one pair that would be releasing. Then it was found out that the on the upper.

Then at the end of 2019 or maybe the beginning of 2020, we found out that there might actually be two different versions of this shoe releasing, one being a lifestyle version and the other being a performance basketball version.

I did a lot more research on the Yeezy Quantum lifestyle vs Basketball because I wanted to give you the right answer.

From what I found, the pair that released in Chicago was in fact the lifestyle version. According to Yeezy Mafia and Hypebeast, the performance version of the Yeezy Quantum actually features a clear TPU cage over the top of the Primeknit upper.

In addition to that, the heel also is apparently slimmed down for extra support and I wouldn’t be surprised if there were less 3M because that’s the reason the NBA actually banned the shoe in the first place.

Another difference between the lifestyle and the basketball versions of this shoe is that the tongue in the lifestyle version has a bit more flex, which makes it easier to get your foot into the sneaker.

Related: Converse Size Chart



What’s interesting about this particular release is that no one was exactly sure which pair this one was. And to make things more confusing, you really have to take a look at the box…

This is the Adidas Yeezy QNTM box. It really does look very similar to a lot of the more recent Adidas Yeezy boxes except it’s slightly larger.

You’ve got QNTM printed on the top meaning Quantum and you’ve got Boost on the left side of the box.

On the drawer side of the box, you’ve got “YZY QNTM” and “Made By Adidas”. On the tag side, you’ve got the same text except you’ve also got a size tag.


What’s interesting is that the lifestyle version of this shoe is just called Yeezy QNTM and the performance version is called the Yeezy Basketball QNTM.

If you look at the size tag, it just says YZY QNTM. At first glance, you think this is a lifestyle version and that makes total sense.

But then if look down past the colorway, you’ll see the word Basketball, which starts to complicate things again.


Now that we can finally clear up some of the confusion around the Adidas Yeezy Quantum, let’s start looking into the sneaker itself…

Related: Yeezy Slides Review




Starting off with the front of the shoe, you’ve got that signature Yeezy suede toe panel. This time around it comes in sort of a cream color and the suede has a very soft feel to it.

The toe panel is obviously not only for aesthetics but also durability. What I like about it is that the shape is pretty reminiscent of the 700.

Something else I’ve noticed about this shoe is that it’s very wedge-shaped. It goes from very high around the top of the ankle to almost basically a pointed toe.

To be honest, my big toe did feel a little bit restricted especially near the front of the shoe, but it wasn’t the worst thing in the world.

Moving back from that suede panel, you’ve got this really interesting midfoot panel on both the lateral and the medial side…


I do have to say that actually seeing this side part makes me like the QNTMs a lot more. This outermost midfoot panel seems to be a mix of Primeknit and also a very similar thin plastic mesh that you kind of find on the side of the 350 V2.

The way that I think this panel is constructed is that the base is actually the plastic mesh and the Primeknit was woven in and through the plastic mesh.

The Primeknit is woven in this very wavy organic look, which actually follows the side of the sneaker or the shape of your foot. It’s a really nice touch.

Not only that but the knit doesn’t just come in one color. It comes in a sort of a static pattern made up of whites and dark grays.

You can actually look through the exposed plastic mesh, which isn’t hard to do because it’s actually a little bit wider spaced than the mesh in the 350s.

3M Ribbons


The other thing you’ll notice are these ribbon-looking strips (pic 7.19) which are actually covered in 3M. These strips actually line up with the ribbons that are being used as lace eyelets on the tongue of the sneaker.

I love that detail and I love how much dimension it gives to the side of the sneaker. It makes the shoe so much more interesting than a lot of other sneakers in the market.

Even though there’s a lot going on, it never seems too messy or too out-there because they’re layered in such a way that it’s really subtle unless you hit the shoe with the flash.


Neoprene Layers

Just beneath those 3M ribbons, there’s actually a layer of neoprene. The black neoprene layer is thin enough so you can still get some air ventilating your foot from the midfoot panel but it’s also not too thin where you don’t get any padding whatsoever.



Moving up on the shoe, you get to this very thin black neoprene tongue which is actually connected to the rest of the upper so it’s not really a separate tongue.  It’s more of a bootie construction.

There actually doesn’t seem to be any padding whatsoever, but it doesn’t feel bad against your foot and it seems to work fine. 

It’s an interesting construction method, but I didn’t have any problems when I was wearing the shoe. It didn’t feel like there wasn’t enough padding and it didn’t really chafe, which is always a good thing.



Weaving back and forth over the top of the tongue, you’ve got these black rope laces that weave through those black lace loops that are kind of hidden under the upper.

The laces are actually surprisingly long.




The midsole does seem to be full-length Boost. As you can tell, the Boost is encased on both the lateral and the medial side of the shoe by rubber and that heel counter.

Because of that, the midsole can’t expand as much as it would on something like the Adidas UltraBoost 21. There also doesn’t look to be a huge amount of Boost in the midfoot. It seems to be similar to what you’ve got on the 350s or maybe even a little bit less.



There’s this really widely spaced herringbone traction pattern that comes in this sort of cream white or light yellow colored rubber.


Moving inside this sneaker, you’ve got more of that black neoprene around the top of the ankle and on the inside of the tongue. However, you do have some padding towards the back of the heel, which is a nice touch.

The insole comes in black with the Adidas and Yeezy branding printed on the heel.

Adidas Yeezy Quantum Barium – Differences


The upper and especially the midfoot panel is where you see the majority of the changes between the previous QNTM and the QNTM Barium.

The underlayer material is this tannish gray jacquard knit which actually has 3M woven throughout.

RPU Cage


Above the underlay, you’ve got this smoke gray semi-translucent RPU midfoot cage. This material has sort of a rubbery plastic feel to it and definitely contains your foot better than the previous Quantum and offers more durability.

What’s interesting about this RPU cage is that this was actually on the basketball variant of the first QNTM colorway.

On the inside, you’ve got this black sock liner which is kind of the other side of the neoprene material.

Colorway Availability

In my opinion, the Adidas Yeezy QNTM Barium is a second or third colorway to the Quantums. Colorway-wise, they’re not too different than the previous pair.

The colors they use are very subtle but they do add some performance improvements which I really like like the RPU midfoot cage.

The other good thing about the Barium colorway is that it was much more widely available than the OG one, which to my knowledge only came out in Chicago.

So, if you want to pick up a pair of Quantums for basketball wear or otherwise, this is definitely the colorway to go with because it’s easier to get, it looks solid, and it’s a pretty comfortable sneaker.


The Adidas Yeezy QNTM is a shoe that has a lot going for it. It’s not the most comfortable sneaker in the world, the fit isn’t perfect, but the aesthetics of this shoe are pretty interesting and I think a lot of people are very excited about it.

Was the Yeezy Quantum worth the wait? Probably not, but that’s because the shoe was hyped up for like two years before it actually released. There’s no shoe that can kind of live up to that kind of hype.

As a lifestyle shoe, the Adidas Yeezy Quantum is a pretty solid sneaker. It comes in a reasonable retail price of $250 and looks great on feet.

I would love to know your thoughts on the Adidas Yeezy Quantum and whether you grabbed a pair, whether you passed, or whether you plan to get a pair in the future if it does eventually ever re-release.

I hope this Adidas Yeezy Quantum Size chart was helpful. If we missed out on anything, please let us know in the comments section.  

About Eric Barber

Eric Barber is a happy father of two little angels, a husband, and a runner. He eats, sleeps, and dreams anything foot related: running shoes, walking shoes, sneakers, you name it. It all started when Eric was a shoe store specialist watching and fitting people's feet day in and day out.

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