Nike vs adidas sizing: How do they compare?

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It's important to get the fit right when buying new shoes, which is why you may be wondering how Nike and adidas, two of the biggest sportswear brands in the world, compare in terms of sizing.

To help you find the answer, we've outlined some of the similarities and differences between how both brands' sneakers fit in one handy guide.

In fact, we'd argue there's never been a better time to learn as both brands' shoes consistently feature among the best sneakers for fall. So, with temperatures starting to drop, why settle for anything less than a perfect fit this season?

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That said, not every type of shoe will fit the same, especially if you compare some of the best basketball shoes with some of both brands' best running trainers. However, there are still a few things to keep in mind when trying to determine which brand will fit you best.

With that being said, let's get into our comparison of Nike and adidas sizing right here...

Nike vs adidas - How Should They Fit?

Nike and adidas are two of the biggest names in sports apparel, with both brands' shoes extremely popular picks for training, exercise, and everyday wear.

However, in order to determine which brand will be best and most comfortable for you, you need to first understand how your shoes should fit.

As a general rule, Clarks recommends leaving about one finger's width between your longest toe and the end of your shoes, with the natural bend occurring around the balls of your feet.

This is something we've covered in more detail in our guide on how should basketball shoes fit; however, the premise remains the same when talking about other forms of footwear like these Nike Air Winflo 9 running shoes or adidas' 4DFWD 2s.

Nike Winflo 9 product image of a navy knitted sneaker with light blue accents and white midsoles.
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Credit: Nike

Size Guide

With how your shoes should fit established, it's time to see how the two brands compare for size.

As seen below, when it comes to both brands' running shoes, Nike trainers are actually 0.2" bigger than adidas trainers, thus making them a full 44 in EU sizing.

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Nike size chart vs Adidas size chart for shoes.
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Credit: Run Repeat

As a result, it seems as though Nike shoes, particularly running trainers, fit true to size, while you may need to go half an EU size larger in adidas sneakers.

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That said, the length of your shoes is just one aspect to take into consideration when getting the right fit.

You also need to take into account the width of your shoes which, in the case of basketball shoes, for example, can be slightly wider than running trainers thanks to the slightly wider toe boxes.

As mentioned though, this is based on both brands' running shoes, so sizes may vary for alternative sneaker models, with some of the best Air Force 1s, for instance, often regarded as slightly wider-fitting.

Make sure you check out our guide to measuring your shoe size right here to help you find the perfect fit.

Nike vs adidas - Which Shoes Fit Wide Feet?

Being a little larger in size, it is widely regarded that Nike shoes offer a slightly better fit for wider feet; however, adidas offers a selection of exclusively wide-fit footwear.

In said range, you'll find a selection of golf shoes, football boots, cleats, running trainers, and even a pair of Terrex Sumra sandals.

adidas product image of a single black and white Terrex Sumra sandal
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Credit: adidas

That said, Nike offers its own collection of wide-fitting shoes, which includes extra-wide variations of the highly popular Nike Air Zoom Pegasus 39s mentioned in our guide to Nike and New Balance sizing.

Nike Air Zoom Pegasus 39 product image of a pair of a dark green pair of sneakers with white midsoles and bronze and orange details.
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Credit: Nike

Ultimately, it would seem both brands go to great lengths to accommodate wider feet, thus making sure there's the right pair of shoes out there to fulfill everyone's needs. Make sure you check out our list of the best places to buy sneakers if you're interested in picking up shoes from either brand.

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Nike vs adidas - Which Shoes Run Narrow?

Although we've established that Nike shoes may be a little more comfortable for wide feet, both brands still produce a number of shoes that you may find fit slightly narrower than most.

adidas Ultraboosts, for instance, are high-performance running shoes that are designed to fit snugly to keep them lightweight and ensure a secure fit. As mentioned in our guide to Nike and ASICS sizing, you may also find this to be the case with Flyknit Nike trainers as well.

adidas Ultraboost 22 product image of a bright yellow sneaker with black details and white midsoles.
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Credit: adidas

If you're uncertain though, then basketball shoes would be a good option to consider if you prefer a wider fit. The adidas Dame 8s, for example, should fit a little wider than Ultraboosts.

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adidas Dame * product image of a bright yellow and purple sneaker.
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Credit: adidas

If you're looking for more of a lifestyle sneaker, then it may be worth considering Nike Air Force 1s, which were originally designed to be basketball shoes when they first arrived in 1982.

Nike Air Force 1 product image of an all-white sneaker.
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Credit: Nike

It is worth noting that the width between different models of shoes will likely vary for both brands, so we recommend trying on the shoes you're interested in before you buy them (if possible) to ensure that they're a good fit for you.

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