ASICS Shoe Size Chart: US, UK, EU & CM Conversion Guide

What Size ASICS Shoes Should Men Wear?

The right ASICS shoe size depends on your foot length, width, and the particular shoe model, not simply your usual size in another brand. The current ASICS men’s/unisex conversion chart maps US sizes to UK, EU and CM measurements, making it easier to compare international sizing.

For example, US 9 = UK 8 = EU 42.5 = 27 CM on the ASICS men’s/unisex chart. If you normally wear a US 9 in another brand, that can be a useful starting point, but measuring your feet is still the safer way to choose an ASICS size.

The best approach is simple: measure both feet, compare the longer foot with the ASICS chart, then consider the shoe’s width and intended use.

ASICS Men’s Shoe Size Chart

The ASICS men’s/unisex size chart converts US sizes into their corresponding UK, EU and CM measurements. The chart below is based on the current ASICS men’s/unisex sizing information.

Important: CM is particularly useful when comparing international sizes, but do not assume that a CM number represents the exact physical interior length of every shoe. Shoe construction, upper shape and intended fit can affect how a shoe feels.

ASICS’s current published men’s/unisex chart contains these US, UK, EU and CM relationships.

ASICS Size Conversion Examples

If you already know your ASICS US size, the conversion is straightforward.

If you are switching from another brand, do not convert blindly from the brand’s label. Measure your feet first, then use the ASICS chart.

For a broader comparison across international sizing systems, you can also use our global shoe size convert.

How Do You Read an ASICS Shoe Size Chart?

An ASICS shoe size chart is easiest to use when you treat your US size as the starting point and CM measurement as a useful cross-check.

ASICS publishes men’s/unisex sizes across US, UK, EU and CM columns, so you can find the equivalent size in the system used by your local retailer.

What each column means

US: The US men’s shoe size.

UK: The corresponding UK men’s size.

EU: European sizing used widely by international footwear retailers.

CM: The centimetre measurement associated with the ASICS size.

If an online store asks for a UK size and you normally shop using US sizing, simply locate your US size and move across the row.

For example:

US 10 → UK 9 → EU 44 → 28 CM

One common mistake is searching for a mathematical formula to convert sizes. Shoe sizing is not a perfectly consistent mathematical system, so a brand-specific chart is more reliable than a generic formula.

How Do You Measure Your Feet for ASICS Shoes?

The most reliable way to choose an ASICS size is to measure your feet while standing. A few minutes with a sheet of paper, pencil and ruler can prevent an expensive sizing mistake.

What you need

• A blank sheet of paper
• A pencil
• A ruler or measuring tape
• The socks you expect to wear with the shoes
• A flat wall or vertical surface

Step 1: Put the paper against a wall

Place the paper on a hard, flat floor with one edge touching the wall.

Your heel should be positioned gently against the wall.

Step 2: Stand naturally

Stand upright with your weight evenly distributed.

Do not sit down while measuring if you will be using the measurement to select walking, running or everyday shoes.

Step 3: Mark your longest toe

Have someone mark the end of your longest toe.

Do not assume that the big toe is always the longest. Foot shapes vary.

Step 4: Measure heel to toe

Measure from the back edge of the heel position to the mark representing the longest toe.

Record the result in centimetres.

Step 5: Measure the other foot

Repeat the process with the other foot.

It is normal for one foot to be slightly longer than the other.

Step 6: Use the larger measurement

Use the longer foot as your primary reference.

Then compare that measurement with the ASICS size chart and check the specific product’s sizing information before ordering.

If you want a more detailed general sizing process, our men’s shoe size chart provides a broader reference for men’s footwear measurements.

How Does ASICS Size Conversion Work?

ASICS size conversion connects US, UK, EU and CM sizing, but the relationship is brand-specific rather than a universal formula.

For example, ASICS currently lists US 9 as UK 8, EU 42.5 and 27 CM for men’s/unisex shoes.

Quick ASICS conversion reference

If you are converting from US to UK or EU, use the same row rather than estimating the conversion.

For shoppers comparing several brands, our shoe size conversion chart and calculator can provide another useful reference.

Are ASICS Shoes True to Size?

ASICS shoes are often a good starting point from your usual size, but “true to size” should not be treated as a guarantee that every ASICS model will fit identically.

ASICS makes shoes for different activities, including road running, trail running, court sports, lifestyle wear and everyday use. The shape, upper materials, cushioning and intended purpose can influence how a particular model feels.

If your current ASICS shoes fit well, that size is useful information. If you are buying a different model, however, check its product information and consider measuring your feet again.

A practical way to think about ASICS sizing

• Same model: Your existing size is a useful reference.
• Different ASICS model: Recheck the fit and model details.
• Different brand: Measure rather than assuming the same numerical size.
• Different width: Check the available width options.
• Between sizes: Compare your foot measurement with the manufacturer’s current chart.

This is especially important for runners. A comfortable casual shoe and a comfortable running shoe do not necessarily feel identical even when they share the same size label.

How Should ASICS Shoes Fit?

A properly fitting ASICS shoe should hold your foot securely without squeezing your toes or creating excessive movement.

The heel should feel secure, the midfoot should feel comfortably held, and your toes should have enough room to move naturally.

Check these areas before you commit to the size

Toe box: Your toes should not be pushed against the front or sides.

Heel: Your heel should stay reasonably secure during walking.

Midfoot: The shoe should feel supportive without creating uncomfortable pressure.

Width: The sides of your foot should not bulge over the shoe’s platform.

Length: Your longest toe should not feel cramped against the front.

Overall comfort: There should not be a pressure point that becomes more noticeable after several minutes.

A shoe that feels “snug” because it is compressing your toes is not necessarily a better fit.

What Are the Signs Your ASICS Shoes Are Too Small?

Shoes that are too small usually reveal themselves through pressure, toe contact or discomfort rather than the number printed on the label.

Watch for these signs:

• Toes touching the front of the shoe
• Pressure on the little toe
• Numbness or tingling
• Toenails repeatedly hitting the front
• Pressure across the widest part of the foot
• A feeling that the foot is being squeezed
• Discomfort that increases during longer walks or runs
• Needing to loosen the laces excessively to relieve pressure

One particularly useful test is to walk around for several minutes rather than judging the shoe immediately after putting it on.

Your feet can feel different after extended activity, so a shoe that seems acceptable for 30 seconds may become uncomfortable later.

What Are the Signs Your ASICS Shoes Are Too Large?

An ASICS shoe is too large when your foot moves excessively inside it or you have to compensate with lacing to keep it secure.

Common warning signs include:

• Heel slipping noticeably
• Foot sliding forward while walking
• Excessive movement inside the shoe
• Having to tighten the laces unusually hard
• Creasing in an uncomfortable location
• Feeling unstable during changes of direction
• Toes gripping the ground to keep the shoe secure

A little movement is not automatically a problem, especially in some running shoes, but excessive heel or forefoot movement can affect comfort.

If the length is correct but the shoe still feels loose, the issue may be width or shape, rather than simply needing a smaller size.

Does ASICS Make Different Shoe Widths?

Yes. ASICS offers different width options on some footwear, so choosing the right width can be just as important as choosing the right length.

A standard men’s shoe may work well for one person but feel restrictive for someone with a wider forefoot.

ASICS product pages identify width information for individual models. For example, current ASICS product listings can identify a standard men’s width as D.

Signs you may need a wider fit

• Your toes have enough length but feel squeezed from the sides.
• Your forefoot feels compressed.
• The shoe leaves pressure marks along the sides.
• Your foot appears to spill over the edge of the sole.
• You repeatedly loosen the laces to create more space.

Do not automatically increase the length to solve a width problem. A longer shoe can create unnecessary movement.

Does ASICS Shoe Fit Vary by Model?

Yes. The same numerical size can feel different between ASICS models because shoes are designed for different activities and foot experiences.

A lightweight running shoe may feel different from a structured stability shoe. A lifestyle sneaker can also have a different upper shape from a performance running shoe.

Before purchasing, check:

• Intended activity
• Width availability
• Upper construction
• Cushioning design
• Heel structure
• Toe-box shape
• Product-specific sizing information

This is one reason why a general ASICS shoe size chart should be used as a sizing reference rather than as a promise that every model will feel exactly the same.

ASICS Shoe Size Finder: What Should You Do If You’re Between Sizes?

If your measurement seems to fall between two options, do not immediately choose a larger shoe simply for extra room.

First check whether the measurement was taken correctly.

Then consider:

• Which foot is longer?
• What socks will you wear?
• Is the shoe for running or casual use?
• Does the model offer different widths?
• Is your foot wide or narrow?
• Does the product page provide model-specific guidance?

For performance footwear, the best size is the one that gives you a secure heel, comfortable midfoot and adequate toe space without excessive movement.

What Should You Look for When Buying ASICS Shoes?

The correct size is only one part of a good shoe purchase.

Start with your measurement

Know your foot length before opening the shopping page. This prevents you from being influenced by a familiar size number.

Think about how you will use the shoes

Running, walking, gym training and casual wear can require different fit characteristics.

Check width

If your foot is wider than average, look at the available width options instead of automatically buying a longer shoe.

Consider socks

A thin running sock and a thick everyday sock can change the amount of space inside a shoe.

Try both shoes

If shopping in person, wear both shoes and walk around.

Feet are not always identical, so fitting only one shoe can hide a sizing issue.

Test the heel

Walk naturally and check whether the heel stays reasonably secure.

Check your toes

Your toes should not feel compressed or forced into an unnatural position.

What Are the Most Common ASICS Sizing Mistakes?

The most common mistakes are surprisingly simple.

Choosing the same size automatically

Your Nike, Adidas, New Balance or other shoe size may be useful as a reference, but it should not replace measurement.

If you are comparing brands, our Nike shoe size chart and Adidas shoe size chart can help you compare sizing systems.

Measuring only one foot

One foot may be slightly longer than the other.

Use the larger measurement.

Measuring while sitting

Your foot can behave differently when it is bearing weight.

Measure while standing naturally.

Ignoring width

A shoe can be long enough but still too narrow.

Buying extra length for no reason

More space is not automatically better. Excess length can increase unwanted movement.

Using a generic conversion formula

US, UK and EU sizing do not follow a simple universal mathematical conversion.

Use the brand’s own chart whenever possible.

Ignoring the shoe’s purpose

A performance running shoe should be assessed differently from a casual sneaker.

Expert Tips for Getting the Right ASICS Size

ASICS Shoe Size Chart vs Other Popular Brands

If you are switching from another footwear brand, remember that size labels are not perfectly interchangeable.

For comparison, Urban Style Footwear also provides brand-specific guides for:

The safest approach is to compare the actual brand chart and your foot measurement rather than assuming that US 9, for example, will feel identical across every brand.

ASICS Shoe Size Chart for International Shoppers

International shoppers often encounter the same shoe listed in different sizing systems.

The easiest solution is to identify the size system being used by the retailer and then convert using the ASICS chart.

For example:

ASICS US 10 = UK 9 = EU 44 = 28 CM.

ASICS US 11 = UK 10 = EU 45 = 28.5 CM.

ASICS US 12 = UK 11 = EU 46.5 = 29.5 CM.

These conversions are based on ASICS’s current men’s/unisex chart.

If you regularly purchase shoes internationally, keeping your foot measurement in centimetres is useful because it gives you a consistent reference when comparing different sizing systems.

Why CM Can Be Useful When Comparing ASICS Sizes

US, UK and EU sizes are labels. A centimetre measurement gives you a more direct way to describe foot length.

That makes CM particularly useful when:

• Shopping from an international website
• Comparing US and UK sizing
• Switching brands
• Buying shoes online
• Helping someone else choose a size
• Keeping a record of your foot measurements

However, CM should still be interpreted alongside the manufacturer’s sizing information. It should not be treated as a promise that the shoe’s internal space will measure exactly the same as the listed CM value.

Can You Use Your Old ASICS Shoes to Choose a New Size?

Yes, but use your old ASICS size as a reference rather than the only evidence.

If your existing pair is comfortable, look at the size printed on the shoe. Then consider whether the new shoe is the same model or a different type of ASICS footwear.

If the model is different, compare your foot measurement with the current sizing information and pay attention to width and intended use.

This simple extra step can prevent the common mistake of assuming every ASICS shoe will fit identically.

When Should You Replace Your ASICS Shoes?

Replacement is not determined by the size label alone.

For everyday shoes, look for visible wear, loss of support, damaged materials or a noticeable change in comfort.

For running shoes, pay attention to how the shoe feels during activity as well as visible wear.

If a shoe suddenly feels uncomfortable despite being the correct size, inspect the condition of the shoe before assuming you need a different size.

Frequently Asked Questions About ASICS Shoe Sizes

Is ASICS true to size for men?

ASICS can be a good match for your usual size, but true-to-size fit is not universal across every foot or every model. Your foot length, width, socks and intended use all matter. If you are buying a new ASICS model, use your current size as a starting point and confirm it against the current ASICS sizing information.

What is US 9 in ASICS UK size?

In the current ASICS men’s/unisex size chart, US 9 corresponds to UK 8, EU 42.5 and 27 CM.

What is US 10 in ASICS UK size?

ASICS men’s US 10 corresponds to UK 9, EU 44 and 28 CM on the current conversion chart.

What is US 11 in ASICS EU size?

An ASICS men’s US 11 corresponds to EU 45 and UK 10, with a listed CM measurement of 28.5.

What is US 12 in ASICS EU size?

The ASICS men’s/unisex chart lists US 12 as EU 46.5, UK 11 and 29.5 CM.

Should I size up in ASICS running shoes?

Do not automatically size up simply because a shoe is designed for running. First measure your feet and evaluate the fit of the particular model. If the shoe is short or your toes are contacting the front, a different size may be appropriate. If the problem is width, increasing length may not solve it.

Should I choose ASICS based on my Nike size?

Your Nike size can be a useful starting reference, but it should not be treated as an exact ASICS equivalent. Different brands use their own sizing systems and shoe shapes. Measure your feet and compare the measurement with the ASICS chart before ordering.

Is CM the same as shoe length?

Not necessarily. The CM value on a shoe size chart should be treated as a sizing reference rather than a guarantee of the shoe’s exact internal length. Construction, shape and fit can affect the usable space inside the shoe.

How do I know if my ASICS shoes are too small?

Common signs include toes touching the front, pressure across the forefoot, numbness, repeated discomfort and toenails hitting the front of the shoe. If the shoe feels tight even after adjusting the laces, check both length and width rather than assuming you only need to loosen the shoe.

How do I know if my ASICS shoes are too big?

Excessive heel movement, foot sliding, instability and the need to overtighten the laces can indicate that a shoe is too large or that its shape does not suit your foot. If the length seems correct but the shoe still feels loose, check whether another width or model would provide better security.

Should I measure both feet before buying ASICS shoes?

Yes. Measure both feet because they may not be exactly the same length. Use the longer foot as your main reference when selecting a size. This is particularly useful when buying online because you cannot rely on trying several sizes before making the purchase.

Can ASICS sizes vary by shoe model?

The numerical size chart provides the brand’s size conversion, but the way a shoe feels can vary by model because shoes have different constructions, purposes, shapes and width options. Always check the specific product information when buying a new ASICS model.

Final ASICS Sizing Takeaway

Choosing the right ASICS shoe size does not need to be complicated.

Start with an accurate measurement of both feet. Then use the ASICS shoe size chart to compare your US, UK, EU and CM options.

If you normally wear a US 9, for example, the current ASICS men’s/unisex chart lists that as UK 8, EU 42.5 and 27 CM.

From there, look beyond the number. Check the width, shoe model, intended activity and overall fit.

The best ASICS shoe is not simply the one with the familiar number on the label. It is the one that gives your foot enough room, keeps your heel secure and feels comfortable for the activity you are doing.

Measure first, compare carefully and then choose your ASICS size with confidence.