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How to Calculate Shoe Size?

Ayakkabı Numarası Nasıl Hesaplanır?

A good shoe should feel good not just in how it looks, but also in how comfortable it is. Of course, choosing the right shoe size is essential for comfort. Shoe sizes follow certain standard measurements, which may vary somewhat by country or brand. However, they are fundamentally based on foot length and width measured in centimeters. Shoe sizes for women, men, children, and babies are available in set ranges.

Shoe sizes used in Turkey correspond to the same measurements used in Europe. Shoe sizes are based on values corresponding to measurements in centimeters and may vary according to the units used in different countries. Shoes purchased in Turkey are sized using a method called the Paris point system. Although many countries use the same system, shoe sizes are represented by different numbers. Because of anatomical differences between men, women, and children, measurements taken in centimeters are converted into shoe sizes using different lasts.

How to Measure Your Feet and Determine Your Shoe Size

To measure your feet, first measure their length in centimeters. Several methods can be used to ensure an accurate measurement and determine your foot width and length precisely. Since everyone’s feet differ anatomically in toe shape, forefoot width, and heel width, the most accurate measurement is obtained by taking care. Then, match your measurements in centimeters to the corresponding values in a shoe size chart.

You can follow these steps in order to measure your feet:

  • Tape a blank A4 sheet flat to the floor at the corners.
  • Place your foot vertically in the center of the paper.
  • Draw lines at the tip of your longest toe (usually your big toe) and at the back of your heel.
  • Measure the distance between the lines drawn on the paper with a ruler.
  • Compare your foot length in centimeters with the sizing chart used by the shoe brand.

If your feet are wider than average and you want to find out the width of your forefoot, you can follow these steps:

  • Place your foot on an A4 sheet of paper secured to the floor.
  • Draw lines at the widest points of the forefoot.
  • Measure the distance between the lines with a ruler to find your foot width.
  • People with wide forefeet may feel more comfortable choosing shoes half a size larger.

Here’s another method you can use to calculate shoe size for children:

  • Place one foot on a white sheet of paper secured to the floor while standing upright.
  • Carefully trace around the foot with a pencil.
  • Use a ruler to measure the distance between the heel and the longest toe (length), and between the big toe joint and the little toe joint (width).
  • Repeat the same process for the other foot, since one foot may be larger than the other.
  • Choose a shoe size based on the foot that is longer and wider.

What Are the Differences Between Shoe Sizes in Different Countries?

Countries use different shoe sizes based on their own measurement systems. With a little research, you can quickly find the information you need to compare international sizes. Since sizing systems vary, it’s a good idea to check which system the product you choose uses.


The Paris sizing system, of French origin and used in Türkiye and Europe, is based on foot length. After measuring the foot, 1 cm is added to the measurement to make the shoe last. This makes it one of the most comfortable methods for wide feet, too. The point system, also known as the pont system, is used by many brands in Türkiye and Europe. This sizing system has no half sizes, only whole sizes. For example, if a size 36 shoe feels tight, choose the next size up, 37. In the pont system, sizes change by 3 for every 2 centimeters, with each pont calculated as 0.6 cm. The French sizing system is marked TR and EU (Europe) on shoe labels.

United States shoe sizes are marked “US” on the label. Women’s sizes generally start at 5. The US uses two different systems: standard and international. The two sizing systems differ by half a size. Like the UK shoe sizing system, the US international system includes half sizes, with each half-size changing by 4.233 millimeters. In the standard sizing system, women’s and men’s sizes use a +1 formula.

England, Pakistan, South Africa, Ireland, and other countries that use the UK system follow the same sizing system. It is an improved version of the old English barleycorn system. Shoe sizes increase or decrease in increments of 8.47 mm, or 1/3 inch. Although women’s and men’s sizes generally use the same scale, sizing may vary by brand.

Shoe sizing systems used in other countries are as follows:

  • Although Canada uses standard sizes similar to the American system, children's, women's, and men's sizes are generally calculated without adding 1.
  • In Japan, Taiwan, and China, shoe size is based on foot length and circumference and is given in centimeters. Foot widths are expressed using different letters, such as A, B, C, D, E, F, and G.
  • Countries in Europe, such as Germany, Belgium, Denmark, and Italy, use the French Paris point system.

How Do You Determine Children's Shoe Size?

Choosing shoes for children can be challenging because they are constantly growing. You can measure your child's feet using the methods described above to find their current foot size. You can also use the size charts that brands create based on age, height, and weight. However, since every child grows differently, measuring their feet gives the most accurate results. Standard size charts may not always be reliable for this reason.


If your child stands up while wearing a shoe and their toes touch the front, it may be time to buy a new pair. If the shoe's toe is too stiff to press down, remove the insole and compare it with your measurement to see if it's time to change sizes. Although it's common to choose shoes one size larger for children, the healthiest choice is to buy shoes based on their current foot measurements.

What Are the Shoe Size Calculation Formulas?

Foot length and width can be measured using various methods, such as a foot-measuring device, tracing the foot on paper, or measuring the insole. Although shoe lasts vary by brand and even by model, these measurements generally give the most accurate results. When shopping in different countries, you can find the right model by using a shoe size converter. Usually, it's enough to enter measurements in millimeters or centimeters. Still, here are some of the different formulas used to calculate shoe sizes in various countries:

  • Paris point: 3/2 x foot length + 2
  • US method: 3 x foot length in inches – 22
  • UK method: 3 x foot length in inches – 23
  • Canadian method: 3 x foot length in inches - 22

How to Measure Shoe Size for Women's, Men's, and Children's Shoes?

Shoe sizing systems used in different countries may vary for women, men, and children. Some measurement systems don't distinguish by gender, while many account for anatomical differences in their calculations. For example, in the Paris Point system, which is also used in Turkey, 29 centimeters corresponds to a size 47 for women and size 45 for men. The same foot measurement corresponds to size 46 in China, 10.5 in Australia, 45 in Europe, and 11.5 in the United States for men.

What Should You Keep in Mind When Determining Your Shoe Size?

If you want to determine your shoe size, keep the following in mind to get more accurate results:

  • Feet swell in the late afternoon, so this is a good time to take measurements. Taking swelling into account when measuring helps you choose comfortable shoes for all times of the day.
  • Seasons and styles should also be taken into account when choosing the right shoes. For example, you may want to wear thick socks with winter boots. So you can account for the thickness of your socks by going up one size.
  • A half-size difference may not make much of a difference in everyday shoes, but it can have a big impact when choosing athletic shoes. During exercise, the feet are subjected to intense movement, and a half-size difference can lead to problems such as swelling and blisters.
  • Foot measurements should always be taken while standing, and shoes should be tried on while standing upright. That's because feet spread when you stand and become narrower when you're seated, as they don't rest fully on the ground.

What Is a Shoe Size Measurement Unit, and How Is It Calculated?

Shoe sizing systems use different formulas to calculate measurements in centimeters or inches. Inch-based calculations are divided into increments according to the country to determine shoe sizes. Different additions and subtractions are applied for women and men to convert measurements into shoe sizes. Shoe sizing systems don't simply use measurements in centimeters; they also apply calculations that increase or decrease the shoe size in small increments.

For foot health, it's important to always choose the right size and product. Shoes aren't just part of an outfit; they're among the most important things people use in their daily lives. You can always find quality shoes in Derimarket's range and wear them comfortably. If you need stylish leather and fur bags to complete your outfits, don't forget to browse the women's bag styles, too!

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