Nike Air Presto Sizing: Letter Sizes (XS to XXL) vs Numeric Fit

The answer depends on which Air Presto you are buying. The original letter-sized Presto runs big, so if you can, pick the smaller of two sizes. Numeric-sized models such as the Presto React fit true to size, and the Acronym Presto Mid runs long and slightly narrow.

The confusing part is the labeling. Some Prestos are sold in T-shirt sizes (XS, S, M, L and so on), while others use ordinary numbers. Before you worry about fit, check which system the listing uses, because the same shoe name can follow different rules depending on the release.

Two sizing systems, one shoe name

The original Air Presto launched with a T-shirt sizing scheme, and it covered a range of foot sizes per letter. That is the system on the OG Presto, and the Acronym Presto returns to it. Modern releases like the Presto React and the Off-White Presto use numeric sizing, which you can treat like any other Nike shoe. Some models have moved between systems over time, so do not assume from the name.

When a listing shows letters, look for a conversion chart on the product page or the box. When it shows numbers, use your normal Nike size and the chart further down.

What the letters cover

Each letter spans about two US sizes, and charts differ on the exact ranges. One chart shows men's S at 7 to 9, M at 9 to 11, L at 11 to 13 and XL at 13 to 15. A different, older chart puts M at about men's 9 to 10 instead. We could not reconcile the two, so we cannot give you one authoritative table. Use the ranges below as a rough orientation only, and confirm with the retailer or the brand.

• XS: about men's 5 to 7
• S: about men's 7 to 9
• M: about men's 9 to 11, though some charts narrow this to 9 to 10
• L: about men's 11 to 13
• XL: about men's 13 to 15

The important point is that a letter size is a range. If you are a men's 9 and a Medium covers a 9 to 11, you are at the very bottom of the range, and the shoe will feel loose. That is the main reason the original feels big.

Model by model

OG Air Presto

This one runs big. One reviewer reported that a Medium left roughly two inches of empty space, and that a size 9 felt oversized. The upper is soft and roomy, and it stretches more than most Nike shoes. If you are between letter sizes, take the smaller one. For wide feet, the roomy cut can work well.

Acronym Presto Mid

This version runs long and slightly narrow. The width is fine for many feet, but there is extra room in the length. Going down to a men's 8.5 was reported as too tight, so when you are between sizes, go with the larger one here. Wide feet should be careful because the shape is narrow.

Presto React

True to size for most people, and a better match for slightly wide feet than the others. The stitching and structural pieces on top can feel restrictive across the forefoot or over a high arch. If your feet are wide, half a size up is a reasonable choice. For very wide feet, you may need to go up.

Off-White Presto

True to size, sold in whole sizes only. The upper is supportive without squeezing, and the toe box opens up beyond the collar. The collar itself has little give, so the pull-on can be tight. If you are a half size, you can go down and loosen the laces, or go up a full size, which one reviewer found wearable.

Width and volume

The OG is the roomiest and the Acronym is the narrowest. The React sits in the middle and is the easiest recommendation for average feet. The shoes also differ in how they handle volume. The OG's soft upper adapts to high-volume feet, while the React's structure can leave less space over the instep.

Our wide feet guide has more on choosing between length and width, and the how sneakers should fit page shows what to check in the first minutes of trying a pair on.

How Prestos compare with other Nikes

Prestos stretch more than most Nike shoes, so they are a poor match for the rules you use with leather sneakers. In an Air Force 1, many people go half a size down. In a Presto React, you go true to size. In an OG letter-sized pair, you often go down within the range. Our Air Force 1 sizing guide explains that difference.

Think of the numeric Prestos as ordinary Nike running-style shoes, and the lettered ones as a separate system you check by chart each time.

A worked example: a men's 9.5 foot

Say your foot measures 26.7 cm, which is a men's US 9.5 on the chart below. In a Presto React or an Off-White Presto, you order a 9.5 (the Off-White only comes in whole sizes, so see the note above). In an OG letter-sized pair, the answer is less obvious. A Medium covers roughly 9 to 11 on one chart, which puts you in the lower half of the range, and a Small covers roughly 7 to 9, which is too small for you. Here the guidance is to go with the smaller option when between two, but because you would be at the very edge of the Small range, the Medium is the realistic choice, and you should expect extra room.

That kind of edge-case is exactly where ordering two sizes pays off. Keep both, wear them indoors, and send back the one that slides.

What the fit feels like when it is right

Presto fit is defined by a hugging, sock-like feel. The heel should feel held, the midfoot should be snug but not pressing, and the toes should lie flat with a little space past the longest one. You should not need to curl your toes to keep the shoe on.

A common mistake is to size up because the upper feels tight in the first minute. The material gives, and it gives more than a leather or synthetic panel would. If the pressure is gentle, give it a day. If a toe is touching the front, it is too short and a different size is the answer.

Care and wear: does the fit change?

Because the upper is soft, the fit loosens with use, which is another reason to avoid sizing up. Washing can also change how the shoe feels, so follow the care instructions for your pair. A pair that fit snug at first may feel comfortable after a few weeks, while a pair that was already loose will only become looser.

The firmer, more structured releases, such as the React or the Acronym, change much less, so you should choose them as you would a standard Nike.

Men's and women's sizing

Women's letter sizes use different ranges from men's. For example, a women's Medium on one chart covers 10.5 to 12.5. For numeric models, women's sizes are 1.5 above the men's number for the same foot, so a men's 9 is a women's 10.5. Convert to men's first, then check the model advice above. The men's to women's conversion page has the complete mapping.

Nike men's size chart for numeric Prestos

Use this table for numeric-sized releases such as the Presto React and the Off-White. The foot length column is the real length of the foot for that size. CM (JP) is the box label, which is longer than the foot.

For example, a 27.1 cm foot is a men's US 10. In a Presto React, order a 10 (28 CM on the box). To measure your foot properly, see the foot measuring guide.

Ordering tips

If the shop allows free returns, ordering two sizes is a sensible move with an OG Presto, since the letter ranges are so wide. Keep the tags on until you have decided, and try the pair with the socks you will wear.

The OG is designed to feel like a sock, so a small amount of extra room is expected. What matters is whether the heel stays put and the toes lie flat. A shoe that slides when you walk is too big, and the fix is the smaller letter or number, not a thicker sock.

Our recommendation

For a letter-sized OG Presto, choose the smaller letter when you sit between two, and check the retailer's chart for the real range. For the Acronym Presto Mid, choose the larger size. For numeric Prestos, buy your regular Nike size, with half a size up for wide feet in the React. If you are comparing models across the brand, read our Nike sizing guide.