When you buy shoes, you would have seen the letter “M” on the shoe size. Online or offline, it is always preceded by numbers, and everyone gets puzzled: “What does ‘M’ in shoe size mean?” It’s very straightforward and significant: “M” stands for “medium” width. It’s a letter that indicates a standard width number in shoe size to lead you to the perfect fit. But there’s more.

Later in this article, we will discover what “M” stands for in shoe sizes, how it varies with different sizing systems, and why it is crucial to know about the width of the shoe when we are talking about comfort and performance.

To learn about more shoe sizing standards, read our recent article What Does UA Mean in Shoes? 

What Does M Mean In Shoe Size

‘M’ in US Sizes

There are sizes for men’s and women’s shoes in America. The ‘M’ term is defined differently for both. 

• Men’s Shoes: For men’s sizes, the symbol for medium width is “M”, and this same letter is also “D”. A 10M, therefore, is the same as a size 10D. It is a regular men’s width. Most men’s average foot widths run within this bracket, so stores stock this as the most frequently used width.

• Women’s Shoes: For women, “M” also means medium width, but it’s equivalent to a “B” width. A women’s size 8M is the same as a size 8 B. The standard width for women’s shoes comes from this size unit. Women’s feet are generally narrower than men’s. If you’re a woman with average foot width, you’ll likely find that most shoes labelled “M” fit comfortably. 

This is important because a man’s medium width is larger than a woman’s medium width. This allows for the average shape of each foot. A woman’s medium-width shoe, for instance, may be too small for a man who has a broad foot, despite the fit over the toes being perfect.

‘M’ in UK Sizes

The British shoe size system is the same as that used in the United States, but with different numeric values. The letter “M” for medium width is the same, but the corresponding letters differ:

• Men’s Shoes: “M” is equivalent to “F” in the UK, which is the UK medium-width standard for men. It is specifically constructed to fit the typical UK men’s foot shape, which varies from that of the US by reason of variation in foot anatomy and size recommendations.

• Women’s Shoes: In women’s shoes, “M” is standard medium width. Women’s UK medium-width shoes are smaller than those of men to fit the typical shape of a foot.

If you shop for UK-sized shoes, keep in mind that the numerical size will differ from US sizes; US men’s size 10 is a UK men’s size 9. This difference can be confusing, especially when shopping online, so always refer conversion chart to ensure you are selecting the correct size.

To learn more about shoe types, read our article What Does SE Mean in Shoes?

‘M’ in European Sizes

European sizes follow the foot length in centimetres. In contrast with the US and UK systems, European sizes often do not specify width as in “M” on the label. But some brands use “M” for medium width. In such cases, “M” has the same meaning as it has in the US and UK systems.

European sizes are typically a simpler system as they only include foot length. This, though, makes it more difficult to match the width in case your feet are either narrow or broad. If you are buying shoes that are labelled as European size and find that there is an “M” on the package, then it is safe to assume that this represents medium width. But it is always preferable to go through the size chart offered by the brand or try them in the store to get a fit shoe.

Why is Width important When Getting the Perfect Fit Shoes?

Width is just as important as length when finding your perfect fit. Shoes that are too tight or too loose not only ache and feel awful, but may also cause long-term problems within your feet. The following is why width is important:

Too Tight Shoes

Too tight shoes have an endless list of problems, some of which are:

• Calluses and Blisters: Pressure friction induced by compressive shoes also results in inflammatory blisters and calluses on your feet. Standing and walking for many hours is a pipe dream.
• Bunions and Corns: Progressive stress progressively results in corn or bunion development. Bunions are bony prominences over the joint of the big toe where the base of the big toe rubs, and corns are stiff areas of hardened keratinized skin, which are tender except when relieved.
• Numbness and Tingling: Tight shoes are a compression, and compression cuts off the blood supply, which results in numbness or tingling in the feet. This is your signal that the shoes are too tight and need to be replaced.
• Ingrown Toenails: Tight shoes force the toenails into the skin, and ingrown, sore toenails are a reality. This occurs in individuals wearing tight shoes with a constricting toe box.

Solutions For Tight Shoes

If your shoes are too tight, there are a few methods of stretching them for a more comfortable fit. 

• An effective technique is the use of a shoe stretcher, a piece of equipment that will widen or lengthen your shoes. 
• Simply place it inside the shoe and adjust it to focus on tight spots. For leather shoes, use a stretcher with a bunion plug to specifically target pressure areas. 
• Another DIY tip is to wear two thick socks and then use the blow dryer on medium heat to warm the tight areas. Walk around until the shoes are cold to the touch so that the material stretches. 
• For a hand-free DIY solution, try the freezer method: put two bags of water in plastic bags, put them in your shoes, and leave them overnight in the freezer. 
• As the water freezes and expands, it stretches the shoes. If DIY does not work, take a professional to a cobbler.

Too Loose Shoes

On the other hand, shoes that are too wide can also cause problems:

• Lack of Support: Loose shoes don’t provide adequate support, leading to instability and discomfort. This can be particularly problematic if you’re on your feet for long periods or engaging in physical activity.
• Sliding and Friction: Your foot will most likely slide around in the shoe back and forth, generating friction and blisters. It is most likely going to be in heels or dress shoes that are not a good fit.
• Tripping Hazards: Large shoes are very likely to trip or stumble over. It is somewhat of a safety problem, but rather for kids or the elderly.
• Foot Fatigue: If your shoes are loose, then your feet strain to stay in place. This leads to foot fatigue and discomfort even for a short walk.

Solutions For Loose Shoes

• If your shoes are loose, solutions to tighten them are easy.
• First, insert insoles or padded insertions to take up space and give added support.
• Anti-slipping devices, such as heel grips or heel pads, can be employed for a snug fit, eliminating friction in the process.
• Alternatively, insert thicker socks or double socks within the shoes to take up extra space.
• If the shoes remain too loose, try lace-up styles such as the “heel lock” technique, where the laces are tied around the ankle to provide a tighter fit.

Why Do Men’s and Women’s Shoes Have Different Widths?

Men’s and women’s shoes are designed differently to fit the average shape of each gender’s foot. The following is how width differs:

• Men’s Shoes: A man’s foot is wider than a woman’s, and the male medium (M or D) is indeed wider than a woman’s medium. If you have a wider foot, then you’ll need to search for shoes that are “W” or “XW” in hopes of being able to find one that will fit well.

To learn about Golden Goose shoes, read our article Why Are Golden Goose Shoes So Expensive?

• Women’s Footwear: Because women also tend to have smaller toes, their medium width (M or B) will also be smaller than a man’s. Some women do have big feet and will need to go look for women’s wide-width shoes that are labeled as “W” or “XW.” Don’t forget that not all manufacturers carry women’s wide widths, so you may find yourself having to look around somewhat to locate what you want.

This difference permits footwear to be used by women and men in a comfortable way and also to be suitably supported. But remember, the structure of the foot could differ substantially between the genders, and thus always better to use a trial for purchase.

Measuring Your Foot for Accurate Sizing

To find the perfect shoe size, it’s essential to measure your foot accurately. Here’s how to do it:

Tools You’ll Need

• A piece of paper
• A pen or pencil
• A measuring tape or ruler

Step-by-Step Instructions

• Draw the Outline: Stand on a flat surface with the paper and draw the outline of your foot using a pencil or pen. Spread your weight evenly to get an accurate reading.
• Measure the Length: Place the ruler from the heel to the longest toe and measure. Your foot length is this. Measure both feet as one foot could be slightly longer than the other.
• Measure the Width: Measure the width across the ball of the foot, which is generally the widest area. This is your foot width. Measure both feet to double-check.
• Compare Measurements: Compare measurements to the corresponding width and shoe size using a shoe size chart. Size charts are available on the majority of company websites, so it is simple to purchase the right size.

Tips for Getting the Perfect Shoe Fit

• Shop in the Afternoon: Your feet swell up throughout the day and thus it is advisable to shop for shoes in the afternoon. In this manner, your shoes will also be in perfect shape even when your feet are at their largest size.
• Try Both Feet: Always test both shoes, as one foot will often be ever so slightly larger than the other. Where the difference is real, then you may well be in the market to purchase two sizes or opt to use insoles to come halfway.
• Walk Around: Walk a few feet to see if the shoe is comfortable and supportive. Check for tight or loose areas, and that there is enough room in the toe box.
• Toe Room Test: There should be the width of a thumb between the tip of your longest toe and the back of your shoe. This should enable your toes to move around without hurting.
• Think About Your Socks: Sock thickness can also influence how shoes fit. Try on the socks that you will wear with the shoes, especially when buying boots or running shoes.

Common Shoe Fitting Problems

Despite precise measuring, you can still get a fitting problem. Below are common problems and advice:

Incorrect Shoe Size

When your shoes are too short or too long, they will be unable to offer the support you need. Always get your foot measured and consult a size chart when buying. When between sizes, always go up, not down.

Narrow or Wide Feet

If your foot is narrow or wide, select shoes that are offered in a range of widths. Most companies these days produce narrow (N), wide (W), and extra-wide (XW) versions. If the correct width cannot be found, try adding insoles or inserts to make adjustments.

For more sizing standards, read our article What Are Rep Shoes?

Poor Arch Support

Slouchy shoes that lack arch support will hurt the foot. Select shoes with intrinsic arch support or purchase orthotic inserts. If you have flat feet or extremely high arches, you might need to purchase custom orthotics to receive maximum support.

Wearing the Wrong Socks

The thickness of your socks may influence how your shoes will fit. Wearing with shoes, always wear socks you will be wearing. Wearing your thicker socks when purchasing winter boots, for instance, to ensure they fit properly.

Conclusion

What “M” in shoe size stands for is the big secret to perfect fitting. When purchasing women’s or men’s shoes, a knowledge of how width differs between size systems will save you agony and ensure that your shoes give you the support that you can gain from them. 

Do not forget to have your feet measured correctly, record your foot shape, and wear several sizes so that you can make the most of a comfortable fit. According to these guidelines, you should be all right with casual, comfortable-fitting shoes.

FAQs

1. What does medium width in shoes, size M, refer to?

Medium width in shoes refers to size M. It is the average width for most shoes and similar to a “D” width for men’s shoes and a “B” width for women’s shoes.

2. Are men’s shoes wider than women’s shoes?

Men’s shoes are slightly wider than women’s. A man’s medium (M) is a “D” width, whereas a woman’s medium is a “B” width.

3. How do I take my correct foot measurement?

To measure yours, draw it out on paper, measure heel to toe, and measure the widest point across. Compare your measurement to a shoe size chart.