Nike Vomero 5 vs Asics Gel Kayano 14: What Size Should You Get?

The Asics Gel Kayano 14 and Nike Vomero 5 are two of the most popular retro runners right now, and from a Nike Vomero 5 vs Asics Gel Kayano 14 size comparison perspective, the good news is that I wear the same size in both.

Here’s the quick answer:

My regular US 9 works well in the Kayano 14 and the Nike Vomero 5, so I wouldn’t change sizes when moving from one to the other.

If you have narrow feet, I’d start true to size in both. If the Vomero 5 feels too roomy and you specifically prefer a very close fit, half a size down could be worth trying.

For normal-width feet, true to size is where I’d begin with both sneakers.

The same applies to slightly wide feet like mine. I wear a US 9 in both without feeling like I need extra length or width.

If you have wide feet, I’d still start with your regular size in the Vomero 5. The Gel Kayano 14 is the one I’d be a little more careful with.

If you normally feel pressure through the forefoot or midfoot, going half a size up may give you the extra space you need.

So while the size on the box may be the same, the space you get inside each shoe isn’t.

That’s where this comparison gets more useful, especially if your feet sit anywhere outside the normal-width range.

Now, before getting deeper into the comparison, here’s my usual sizing so you can see how closely my feet match yours.

👟 Nike Vomero 5 vs Asics Gel Kayano 14 Size Comparison

📏 Kayano 14 vs Vomero 5: Do I Wear the Same Size?

Yes. I wear a US 9 in both the Asics Gel Kayano 14 and Nike Vomero 5, and that’s also my measured size.

In the Kayano 14, my US 9 gives me the length I need, and my foot stays secure when I’m walking.

That’s enough length for me, and my foot still feels secure when I’m walking. Even with my slightly wide forefoot, I don’t get pressure along the sides that makes me wish I’d bought a 9.5.

My Vomero 5 also feels right in a US 9. I get the toe clearance I normally look for, while the front of the shoe gives my forefoot enough space to sit naturally.

So there’s nothing happening in either pair that gives me a reason to move away from my measured size.

Neither shoe gives me a reason to move away from my measured size.

Staying with the same size isn’t always a given for me. My Air Jordan 1 and Air Force 1 fit comparison is a good example, since those two actually push me toward different sizes.

↔️ Same Size, But Which One Feels Roomier?

The Vomero 5 feels roomier to me overall.

I’m wearing a US 9 in both, but I have more freedom around my foot in the Vomero 5, particularly toward the front.

The Gel Kayano 14 feels more contained. There’s less empty space inside, although I wouldn’t describe my US 9 as tight.

I notice that difference most around my toes and through the middle of my foot, so those are the two areas worth looking at more closely.

🦶 Toe Space & Forefoot: Where I Notice the Difference Most

The Vomero 5 gives my toes more freedom, but I don’t think the Gel Kayano 14 is meaningfully shorter.

In my US 9 Kayano 14, I have about a finger’s width between my longest toe and the end of the shoe. That’s enough length for me, and I don’t feel my toes getting pushed toward the front when I walk.

What changes is how much space I have around them.

The Vomero 5 opens up more through the forefoot. My toes can spread naturally, and there’s a little more room between the sides of my foot and the upper.

The Kayano 14 follows the shape of my forefoot more closely. With my slightly wide feet, I can feel the sides of the upper sitting nearer to me, particularly around the ball of my foot. My toes also have less room to move from side to side.

But I never get the pressure that would make me question the size.

That’s why I wouldn’t move up to a 9.5 in the Kayano 14. I’d gain more space, but I’d also be adding length when my US 9 already gives me enough.

For my feet, the closer forefoot is simply part of how the Kayano 14 sits. It doesn’t mean the shoe is too small.

🤏 Midfoot: The Kayano 14 Holds Me Closer

The Kayano 14 is noticeably more fitted through my midfoot, and this is probably the area where someone with a higher-volume foot should pay the most attention.

When I lace my US 9 normally, I can feel the upper wrapping fairly close over the middle of my foot. It was a little snug when the shoes were new, but not enough to make me question my size.

I also have some control over that feeling through the laces. If I want less pressure, I loosen them slightly, which gives me enough adjustment without making my foot feel insecure.

The Vomero 5 gives me more room through this area. I don’t have to think as much about lace tension because there’s already enough space over my foot in my regular size.

For my foot volume, neither shoe makes me change size.

I would be more cautious with the Kayano 14 if you have a high-volume foot, though.

If you regularly struggle with pressure over the top of your foot, that closer midfoot could become more important than it is for me and may be a reason to try half a size up.

🦶 Heel Hold: Does Either Shoe Feel Loose at TTS?

No. My heel stays where I want it in both shoes at US 9.

I don’t notice unwanted lifting when I’m walking, and neither pair leaves enough movement at the back to make me consider going half a size down.

Lace tension doesn’t change that conclusion either. I can loosen or tighten both without needing to compensate for a loose heel.

So from the back of the shoe, there’s nothing pushing me toward a different size in either pair.

⏱️ What Happens After a Few Hours?

My US 9 still feels like the right size in both shoes after several hours, and the Kayano 14 was the pair I paid more attention to.

Because it starts closer around my foot, I wanted to see what would happen later in the day when my feet naturally expanded.

I never reached the point where that closer feel became uncomfortable. My little toe didn’t start rubbing against the side, and I didn’t develop the kind of forefoot pressure that usually tells me I need more space.

I paid attention to the midfoot as well. Even after a few hours, it didn’t become restrictive enough that I wanted to loosen the shoe significantly or wished I’d bought a 9.5.

That longer wear is what makes me comfortable recommending true to size for slightly wide feet like mine.

A quick try-on might make the Kayano 14 seem like the pair where I’d need more room, but my US 9 continued to work as my feet expanded throughout the day.

The Vomero 5 gave me even less reason to reconsider my size. After several hours, my US 9 still felt exactly where I wanted it.

🔄 Does Either Shoe Change After Break-In?

Both shoes loosen up a little with wear, but not enough to change the size I’d buy.

The Kayano 14 settles around my foot after the first few wears. That initial closeness through the midfoot eases slightly as the upper becomes more flexible, but I wouldn’t count on break-in to create a lot of extra space.

The Vomero 5 also softens with wear, particularly through its layered upper. Again, the change is fairly small.

I wouldn’t buy either shoe slightly tight and expect it to eventually work. If you’re already feeling uncomfortable pressure when you try them on, I’d choose the size that works from the beginning rather than hoping the materials will stretch enough later.

👣 Which Size Should You Get Based on Foot Shape?

Here’s where I’d start based on your foot shape:

 

The distinction I’d pay attention to is slightly wide versus genuinely wide.

My feet measure around 9D to 9E, with most of that extra width through my forefoot, and I don’t need to compensate by buying a larger size in either shoe. A US 9 gives me enough usable space.

If your feet are genuinely wide, I’d be more careful with the Kayano 14. I’d still try your measured size first, but half a size up becomes reasonable if you regularly need additional width.

A high-volume foot is slightly different. In that case, I’d pay more attention to how the Kayano 14 feels over the top of your foot.

If that area already feels restrictive during try-on and adjusting the laces doesn’t solve it, I’d try the next half size up.

If you’re between sizes, I’d lean toward the smaller size in the Vomero 5 if you prefer a close feel, while I’d be more inclined to take the larger size in the Kayano 14 if your foot is wide or high-volume.

The Vomero 5 is easier to keep at your regular size across more foot shapes. Even for wide feet, I’d begin there and only move up if you know from experience that you need more space than most sneakers give you.

↕️ When I’d Actually Change Size

For most people, I wouldn’t move away from their regular size in either shoe. There are a few cases where I think changing size makes sense.

I’d consider going half a size up in the Kayano 14 if…

You have genuinely wide or high-volume feet, especially if you regularly feel pressure through the midfoot in other sneakers.

If adjusting the laces doesn’t give you enough space, I’d try the next half size up rather than hoping the upper eventually loosens.

I’d consider going half a size up in the Vomero 5 if…

Your feet are very wide, or you simply know that you need considerably more room around your forefoot. I wouldn’t automatically size up just because your feet are slightly wide. Mine are, and US 9 gives me all the space I need.

Would I go half a size down?

Personally, I wouldn’t start by sizing down in either shoe.

My regular size gives me the length I want, so I don’t see a reason to sacrifice toe clearance just to make either pair sit closer.

Even with narrow feet, I’d start with your measured size. The only exception I’d consider is the Vomero 5 if your regular size feels too roomy and you prefer a very close fit.

👟 Coming From Another Sneaker?

If you already own another retro runner, here’s how my sizes compare. These are all based on pairs I’ve actually worn rather than a general conversion between brands.

 

The Nike P-6000 is the easiest reference for me because I wear the same US 9 across all three. I’ve also compared how the P-6000 fits next to the Vomero 5 if that’s the Nike model you’re coming from.

The New Balance 530 is a good example of why I don’t carry the same size automatically from one retro runner to another.

I prefer an 8.5 because my regular US 9 leaves more length than I want, and I explain why in my Nike Vomero 5 and New Balance 530 sizing comparison.

So if you’re coming from a 530 that you’ve sized down, I wouldn’t automatically carry that smaller size over.

With the Gel-1130 and GT-2160, things are simpler. I stay with my US 9 in both, just as I do in the Kayano 14. So if your regular size already works in either Asics model, that’s the size I’d try first in the Kayano 14.

⚠️ Sizing Mistakes I’d Avoid With These Two

Assuming the Kayano 14 runs small because it feels closer

I can see why someone might put on the Kayano 14, notice how closely it sits around the foot, and immediately think about going up half a size.

I wouldn’t make that decision based on that feeling alone. My US 9 sits closer than the Vomero 5, but I still have enough length and my slightly wide forefoot isn’t being squeezed.

A closer shoe isn’t automatically a smaller shoe.

I’ve had the opposite experience with other sneakers, where a small change in construction actually did make me change sizes. That’s exactly what happened when I compared how Nike SB Dunks fit against regular Dunks.

Sizing up just because your feet are slightly wide

This is something I can judge pretty well from my own feet.

I measure around 9D to 9E, yet I stay with a US 9 in both. Going straight to a 9.5 simply because your feet are a little wider could leave you with more length than you actually need.

I’d only start thinking about the larger size when your width is creating actual pressure.

Deciding while you’re standing still

I wouldn’t judge either pair after thirty seconds in front of a mirror.

Walk around. Pay attention to what happens when your foot moves forward inside the shoe and whether any pressure starts developing as your feet warm up.

That was particularly useful with the Kayano 14. Spending several hours in my US 9 confirmed that its closer feel wasn’t developing into a problem.

Nike Vomero 5 vs Asics Gel Kayano 14 Size Comparison FAQ

Do Gel Kayano 14 and Vomero 5 fit the same?

They fit similarly enough that I wear the same US 9 in both, but they don’t feel identical. The Vomero 5 gives me more freedom around my foot, while the Kayano 14 sits closer. For most people, I’d still start with the same size in both.

Which is better for wide feet, Gel Kayano 14 or Vomero 5?

I’d choose the Vomero 5 for genuinely wide feet. My slightly wide forefoot works well in both at true to size, but the Vomero 5 gives me more usable space. With the Kayano 14, I’d be more open to trying half a size up if you regularly struggle with width.

Do Vomero 5 and Gel Kayano 14 stretch after break-in?

A little, but not enough to influence the size I’d buy. Both uppers become more flexible with wear, and I notice the Kayano 14 settling around my foot in particular. Neither changes enough that I’d intentionally buy a tight pair and wait for it to stretch.

Which is easier to size online, Gel Kayano 14 or Vomero 5?

I’d give the Vomero 5 a slight edge, especially if your feet are wide or high-volume. Its extra room makes your regular size a straightforward starting point across more foot shapes. The Kayano 14 isn’t difficult to size, but people who regularly need extra width have more reason to think about going half a size up.

Should I size up or down for the Nike Vomero 5?

For most people, neither. Start true to size. That’s what I do with my slightly wide feet. I’d only consider half a size up if your feet are very wide or you deliberately want considerably more room. I personally wouldn’t size down.

Should I size up or down for the Asics Gel Kayano 14?

I’d start true to size. My measured US 9 works for me even with a slightly wide forefoot. If you have genuinely wide or high-volume feet and regularly experience pressure through the middle of your shoes, half a size up may work better.

Does Nike Vomero 5 run big or small?

For me, the Vomero 5 runs true to size. Nike’s own current customer-review fit indicator also sits around the true-to-size midpoint. It has a relatively forgiving feel on my feet, but I wouldn’t mistake that extra space for the shoe running big.

Does Asics Gel Kayano 14 run big or small?

I find the Asics Gel Kayano 14 true to size. It sits closer around my foot than the Vomero 5, but that doesn’t make it run small. My regular US 9 gives me the length I need without creating uncomfortable pressure.

Which is good for narrow feet, Vomero 5 or Kayano 14?

I’d lean toward the Gel Kayano 14 for narrow feet because it naturally sits closer around the foot. I’d still start true to size in both. If the Vomero 5 feels too roomy at your regular size and you prefer a very close fit, then half a size down could be worth trying.

Final Thoughts

After wearing both, I think the most useful lesson here is that your size and the way you like a sneaker to feel are two different things.

I wear a US 9 in both the Asics Gel Kayano 14 and Nike Vomero 5, and I wouldn’t change either size. But if I handed both pairs to someone else who also measures a US 9, their favorite could easily depend on what they’re used to feeling around their feet.

Someone coming from roomier sneakers may put on the Kayano 14 and wonder whether it’s too small. Someone used to a closer-fitting shoe could try the Vomero 5 and wonder whether there’s too much space.

Neither reaction necessarily means the size is wrong.

That’s why I’ve become less interested in asking whether two sneakers “fit the same” just because I wear the same number in both. A better question is what happens to your foot inside that size.

For me, US 9 gives each shoe enough length to work. From there, it’s my foot shape and the way each shoe uses that space that creates the difference.

If you’ve worn both, I’m especially curious about this one: do you wear the same size in the Kayano 14 and Vomero 5, and if you do, which one feels roomier on your feet?