Easy shoe size conversion and practical shoe size charts

Updated on by Stefan Banse

With the shoe size converter you can convert any shoe size. The calculator is suitable for converting women's shoe sizes, men's shoe sizes und children's shoe sizes and baby shoe sizes. The common size systems, namely EU shoe sizes , UK shoe sizes, US shoe sizes and also Mondopoint shoe sizes, are converted.

And here you can go to the shoe size conversion table for adults as well as the conversion table for children.

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Input help for the shoe size calculator

Shoes for women, men or children

trans Please indicate whether the shoe size conversion is to be made for women's, men's or children's shoes. The European size system and the Mondopoint system do not make any difference in this respect for the calculation of shoe sizes. In the UK and US size systems, however, the sizes for children and adults differ. In the US system, different sizes are also calculated for women and men.

Your size

trans Please select the shoe size you know and indicate it. You can choose from the following shoe size systems: EU shoe sizes, UK shoe sizes, US shoe sizes and Mondopoint shoe sizes. Combined with the above selection option for women's shoe sizes, men's shoe sizes and children's shoe sizes, this gives you the contents of many different size charts for shoes. The calculator uses the ISO 19407 specification.

EU sizes correspond to the usual "German", "French" or "Italian" shoe sizes. They apply in continental Europe, i.e. in Europe, except in Great Britain. UK sizes are used in Great Britain (United Kingdom). Instead of cm, inches are the basic unit of measurement for shoe sizes. US sizes are also based on inches for length. Since these start at a different specific foot length than the UK sizes, they differ accordingly. Mondopoint sizes are the official size unit for shoes in Russia, China, Japan and many Southeast Asian countries. Worldwide, this system is commonly used in sports, such as ski boots. Likewise, it is widely used in the military. Further information on the individual size systems can be found by clicking on the info buttons in the results window of the shoe size calculator.

General info on converting shoe sizes

The allocation of shoe sizes and the different size systems do not make it easy to reliably convert shoe sizes and create realistic shoe size tables. Why is it so difficult to calculate shoe size?

Shoe sizes and shoe size charts have historically evolved

Over the centuries, different methods and ways of working have developed in the shoemaking trade. On the one hand, there were and are the different units of measurement for length - i.e. inches in England and America and centimetres and millimetres in continental Europe. In addition, there are different zero points for shoe sizes in England and America. In America, these are also differentiated between men and women. While in continental Europe children's shoe sizes merge seamlessly into adult shoe sizes, in England and America there are different shoe size tables for women, men and children.

Furthermore, different reference sizes were and are used to calculate shoe sizes. While some manufacturers use the length of the last used to make the shoe to determine the shoe size, other manufacturers use the inside length of the shoe, which should be 10 to 20 mm longer than the foot length, depending on the shoe type. In the meantime, many have switched to the average foot length as a reference value, i.e. as the basis for calculating shoe sizes and shoe size tables.

ISO specification as the basis for the shoe size calculation and the shoe size tables

The shoe size converter uses the ISO specification to convert shoe sizes: ISO (International Organization for Standardization) is the international association of standardisation organisations and develops international standards in almost all fields. With ISO/TS 19407:2015(E), the ISO developed the technical specification for the conversion of shoe size systems. The aim of this specification is to harmonise the historically developed different shoe size systems and the conversion of shoe sizes to an international standard.

The ISO specification sets the foot length in cm (instead of inside length or last length) as the basis for all calculations of shoe sizes and size tables. In addition to foot length as a reference value, toe clearance is also standardised and a corresponding conversion formula is derived for each of the most important shoe size systems. For children's shoe sizes, special regulations apply, especially for toe clearance. ISO/TS 19407:2015(E) is a specification which is intended to become an international standard as soon as development is sufficiently advanced.

Try on and test shoes

The shoe size conversion calculator implements the ISO specification. However, this does not yet constitute a binding international standard. As described, this standard is still missing today due to the size systems that have grown historically over many years and have neither been formalised nationally, let alone internationally. A direct one-to-one conversion into whole or half sizes is only possible by rounding because of the differences between inches and centimetres. So there is no exact solution. Especially with sport shoes such as adidas, Nike, Puma or also at Vans the sizes differ. Therefore, the ISO specification and thus the calculation results and shoe size tables of the converter offer a theoretical calculation method and thus a best possible compromise for calculating the correct shoe size for consumers. It is not only the different and only partially standardised size systems that cause problems. There are also factors such as

  • Different manufacturers' deviations due to different measuring methods, manufacturing processes and tolerances.
  • Different shoe widths
  • Some shoe size tables already take into account an additional margin for the growth of the feet in children's sizes, others do not
  • Depending on the shoe type, length specifications refer partly to the foot length and partly to the inside length of the shoe
  • There are several common US systems - some of which are proprietary - that vary widely.
  • Many tables and specifications of certain manufacturers available on the internet contain errors.
  • Sports shoes in particular often run much smaller than the size indicated. This is the case with Nike, for example.

Therefore, it is ultimately crucial to try on shoes or to fall back on proven shoe sizes of a manufacturer.

Printable shoe size chart for women and men

The following size chart for shoes is based on the ISO calculation formulas for shoe sizes.

Since, for example, an EU size of 40 results in a US women's size of 8.924, the table is rounded to the next possible shoe size or half size, in this case US women's size of 9. This procedure is recommended by ISO to support consumers with a cleanly derived size table for shoes.

Shoe size chart for adults according to ISO specification ISO/TS 19407:2015
EU UK US men US women Mondo­point
34234215
34,52,53,54,5215
35345220
35,53,54,55,5225
36456225
36,5456230
374,55,56,5235
37,5567235
385,56,57,5240
38,55,56,57,5245
39678245
39,56,57,58,5250
40789255
40,57,58,59,5255
417,58,59,5260
41,58910265
428,59,510,5265
42,591011270
439,510,511,5275
43,59,510,511,5275
44101112280
44,510,511,512,5285
45111213285
45,511,512,513,5290
4611,512,513,5295
46,5121314295
4712,513,514,5300
47,5305131415
48131415305
48,513,514,515,5310
49141516315
49,514,515,516,5315
50151617320
EU UK US men US women Mondo­point

Size chart for adults to print out

Here you can get the "Shoe size chart for adults" as a printable image. For on the road and in the shoe­shop. >>

Shoe size chart children to print

Basically, the European and thus e.g. the former "German", "French" and "Italian" shoe size system­does not differentiate between children's shoe sizes and adult sizes. However, in order not to apply a mathematical surcharge of two whole shoe sizes to small feet in the same way as to large feet in the conversion formula, the surcharge for toe clearance for children is applied according to ISO at eight percent of the foot length. Again, the calculated sizes are rounded to the nearest shoe size or half size in accordance with ISO to provide a well-defined table.

Shoe size chart for children according to ISO specification ISO/TS 19407:2015
Foot length, cm EU Mondo­point UK US
12,019,51203,54
12,32012544,5
12,720,54,55
13,02113055,5
13,321,55,56
13,522135
13,822,514066,5
14,2236,57
14,623,514577,5
14,824
15,024,51507,58
15,42515588,5
15,725,58,59
16,02616099,5
16,426,5
16,6271659,510
16,927,51701010,5
17,32810,511
17,628,51751111,5
17,92918011,512
18,229,5
18,5301851212,5
18,830,512,513
19,2311901313,5
19,531,519513,51
19,832
20,032,520011,5
20,4332051,52
20,733,5
21,03421022,5
21,334,52,53
21,73521533,5
22,035,52203,54
22,436
22,636,522544,5
23,0372304,55
23,237,5
23,6382355
Foot length, cm EU Mondo­point UK US

As you have noticed, the size chart for shoes according to ISO leaves some fields open. Here the official formula has not matched. The shoe size calculator also determines the corresponding rounded sizes for the missing fields and gives you the derivation of calculation and rounding behind the respective info button of the result.

Size chart for children to print out

Here you get the "Shoe size chart for children" as a printable image. For on the go and always at hand. >>

Important conversions in practice

Shoe size charts for Europe (EU), England (UK), America (US) as well as Russia, China, Japan (Mondopoint)

You can find the size tables for the other shoe sizes calculated by the shoe size converter in our advice section:

Shoe size charts for adidas and Nike sports shoes

The sizes of many well-known shoe brands, especially those of sporting goods manufacturers, vary greatly. Therefore, we provide you with some size tables in our guide section so that you can also calculate these shoe sizes.

Convert certain shoe sizes to other shoe sizes

On the following guide pages you can convert the following shoe sizes into the shoe sizes of the other size systems.

Shoe size 20, Shoe size 21, Shoe size 22, Shoe size 23, Shoe size 24, Shoe size 25, Shoe size 26, Shoe size 27, Shoe size 28, Shoe size 29, Shoe size 30, Shoe size 31, Shoe size 32, Shoe size 33, Shoe size 34, Shoe size 35, Shoe size 36, Shoe size 37, Shoe size 38, Shoe size 39, Shoe size 40, Shoe size 41, Shoe size 42, Shoe size 43, Shoe size 44, Shoe size 45, Shoe size 46, Shoe size 47, Shoe size 48, Shoe size 49, Shoe size 50.

Source information

As source for the information in the "Sizes of shoe" category, we have used in particular:

Last update on May 10, 2021

The last changes in the "Sizes of shoe" category were implemented by Stefan Banse on May 10, 2021. The main changes were: