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The Only Ultraboost Sizing Guide You’ll Ever Need

Get more out of your runs with the adidas Ultraboost. In our size guide, you can find out how the different Ultraboost running shoes differ.

SO WHAT SIZE ULTRABOOST SHOULD YOU GET?

That depends, among other things, on how you want to use your Ultraboosts. Are they your go-to sneakers to complement your running outfit or do you need them to train for a marathon? In any case, you should first consider the following tips:

1. Find out your correct shoe size. Our size finder will help you with this.
2. Measure your feet in the evening because they swell throughout the day.
3. Choosing between two sizes? If you want the shoe to fit snug, choose a smaller size. If you want the foot to fit looser, take the next size up.

Every new Ultraboost is designed for optimal fit, responsiveness and performance for all distances—whether just one kilometer or marathon distance. Let’s take a closer look at how the Ultraboost fits all runners.

 

ULTRABOOST 5: EXPERIENCE ULTRA ENERGY

The iconic Ultraboost running shoe is back with the latest Ultraboost 5! Here to harness your running energy, Ultraboost 5 was innovated for more cushion, more comfort and less weight for a run like no other. But you’re probably wondering, how do I find my perfect size? Do Ultraboosts run big or small? Here is how to know whether your Ultraboost 5 size is right for you.

How it fits: When it comes to the Ultraboost 5, we’ve got the fit down to a science. This shoe features a PRIMEKNIT upper to ensure a hyper anatomical and adaptive fit so that you can run with total comfort. The right running shoe should improve your runs, not hinder them. Expect the new Ultraboost 5 to hug your foot for a more comfortable and secure run. We’ve also engineered the Ultraboost 5 to feature MOLDED EXTERNAL HEEL SUPPORT for optimized heel support where it’s needed.

How to pick your size: The Ultraboost 5 runs true to size so when shopping, get the Ultraboost 5 in your regular size.

 

ULTRABOOST 1.0 (OG) SIZING: A GAME-CHANGING, HIGH PERFORMANCE FIT 

In 2015, the first Ultraboost bridged the gap between form and function with a silhouette that caught the attention of world-class runners, force-of-nature celebs, and sneakerheads alike.
  
How it fits: “While we mostly got attention from users for the midsole, during development the fit was our quiet obsession,” said Ultraboost Senior Development Manager Sam Forester. That fit was achieved through the sock-like comfort of the Primeknit-laden upper, and highly breathable perforated mesh of the tongue.
 
How to pick your size: Ultraboost 1.0 (OG) sizing is TTS (true to size), so for most people their measured size is the way to go. For wider feet, go a half size up.
 
 

ULTRABOOST 2.0 SIZING: THE GREATEST EVER, AGAIN

The second Ultraboost drop was the continuation of a running juggernaut, incorporating user input to significantly up the comfort factor of the upper.
 

How it fits: Subtle updates to the weave improved how the upper hugged your foot, while the same Primeknit comfort and breathable mesh that made the 1.0 (OG) such a solid shoe allowed you to run free from discomfort.

How to pick your size: Ultraboost 2.0 is similar to the 1.0 (OG), so go with your regular size, unless you have wide feet. Then go a half size up.

 

Ultraboost 3.0 SIZING: EXPANDED COLORS, EXPANDED FIT

The 3.0 blew up the style potential of the Ultraboost with a surge of midsole color options. Sneaker collectors went wild, and besotted run crews from cities across the globe helped the shoe make an indelible mark on the running landscape.
 
How it fits: This was the first Ultraboost with an entire upper constructed of Primeknit. The 3.0 went from feeling like a sock to something approaching a second skin, thanks to motion weave technology enhancing the overall stretchiness of the upper.
 
How to pick your size: With an even more flexible construction, the 3.0 should be a true to size fit for just about everyone.
 
 
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ULTRABOOST 4.0 SIZING: IMPROVING ON GREATNESS

Adaptive, comfortable, energizing. Through painstaking attention to detail and constant collaboration with users, the 4.0 built on every release before it to become the one running shoe to rule the road.
 
How it fits: The 4.0 brought back the extra-breathable mesh from early Ultraboost models and evolved the heel counter to give the Achilles even better support. Set atop the stretchweb outsole, it delivered on comfort, traction, and energy feedback for lengthy runs.
 
How to pick your size: Wider-footed runners should go a half size up. Those with normal or narrower feet should stick with a true to size fit.
 
 
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ULTRABOOST UNCAGED SIZING: REFINED TO THE ESSENTIALS

The Uncaged was designed for minimalist runners who were cutting off the cage of their Ultraboosts. But the Ultraboost team didn’t just cut away tech here. They reinforced the upper to ensure it could handle long stints on the road without the cage.
 
How it fits: “Our top priority was a high performance, supportive fit without a cage. To accomplish this we had to internally reinforce the weave of the Primeknit upper,” explains Matthias Amm. The result feels like an ultra-strong sock that fully supports the midfoot.
 
How to pick your size: The Uncaged is true to size, so most people will be happy with their measured size. Go a half size up if you have wide feet. 

 

ULTRABOOST 19 SIZING: RETHOUGHT. RECODED. REBOOSTED.

The newest Ultraboost is a complete reimagining of what makes a running shoe tick. It focuses on four key features: seamless fabric, improved energy return, fine-tuned torsion, and re-engineered heel support. “We went back to the drawing board for Ultraboost 19,” explains Sam Forester. “It was challenging, but we knew that runners across the world would be better off for it.” 
 
How it fits: The shoe features Primeknit 360 – a seamless 3D knit upper woven to offer a fit so close it’s hard to feel where your foot stops and the shoe starts. But the tech onslaught doesn’t stop there – the coreless 3D heel frame keeps your foot firmly in place during even the most strenuous workout.
 
How to pick your size: Ultraboost 19 sizing is TTS, and the precision fit of the 3D knit upper means just about anyone will feel right at home wearing their measured size.
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