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Size guide
MEN'S SIZE CONVERSION
EUR UK USA CM
39 5.5 6.5 24.5
39.5 6 7 25
40 6.5 7.5 25.5
41 7 8 26
41.5 7.5 8.5 26.5
42 8 9 27
42.5 8.5 9.5 27.5
43 9 10 28
44 9.5 10.5 28.5
44.5 10 11 29
45 10.5 11.5 29.5
46 11 12 30
46.5 11.5 12.5 30.5
47 12 13 31
49 13 14 32
50 14 15 32.5
 


WOMEN'S SIZE CONVERSION
EUR UK USA CM
35 2.5 4.5 21.5
35.5 3 5 22
36 3.5 5.5 22.5
37 4 6 23
37.5 4.5 6.5 23.5
38 5 7 24
39 5.5 7.5 24.5
39.5 6 8 25
40 6.5 8.5 25.5
41 7 9 26
41.5 7.5 9.5 26.5
42 8 10 27
43 9 11 28
44.5 10 12 29


UNISEX SIZE CONVERSION
EU UK USA CM
36 3.5 4 22
37 4 4.5 22.5
38 5 5.5 23.5
39 5.5 6 24
40 6 7 25
41 7 8 26
42 8 9 27
43 9 10 28
44 9.5 10.5 28.5
44.5 10 11 29
45 10.5 11.5 29.5
46 11 12 30
47 12 13 31
48 13 14 32


BOYS SIZE CONVERSION
EUR UK USA CM
33 1 1.5 20.25
33.5 1.5 2 20.5
34 2 2.5 21
35 2.5 3 21.5
35.5 3 3.5 22
36 3.5 4 22.5
37 4 4.5 23
37.5 4.5 5 23.5
38 5 5.5 24
39 5.5 6 24.5
39.5 6 6.5 25
40 6.5 7 25.5


CHILDREN'S SIZE CONVERSION
EUR UK USA CM
28 10 10.5 17
28.5 10.5 11 17.5
29 11 11.5 17.75
29.5 11.5 12 18
30 12 12.5 18.5
31 12.5 13 19
32 13 13.5 19.5
32.5 13.5 1 20
33 1 1.5 20.25
33.5 1.5 2 20.5
34 2 2.5 21
35 2.5 3 21.5


INFANT'S SIZE CONVERSION
EUR UK USA CM
19.5 3.5 4 11.5
20 4 4.5 12
21 4.5 5 12.5
21.5 5 5.5 12.75
22 5.5 6 13
23 6 6.5 13.5
23.5 6.5 7 14
24 7 7.5 14.5
25 7.5 8 15
25.5 8 8.5 15.25
26 8.5 9 15.5
27 9 9.5 16
27.5 9.5 10 16.5
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K-SWISS IS NOW THE OFFICIAL FOOTWEAR PARTNER OF THE ATP
WHY THIS PARTNERSHIP

TENNIS IS WHO WE ARE

We were born on the tennis court in 1966, when the K-Swiss Classic became the world's first all-leather tennis shoe. Sixty years later, tennis remains at the center of everything we do.

Partnering with the ATP, the governing body of men's professional tennis, is a natural next step for a brand that has never strayed from the sport that built it.

Unlike larger multi-sport brands for which tennis is just one category among many, we compete with a singular focus: footwear designed for the demands of the court.

WHAT THE PARTNERSHIP INCLUDES

A COMPLETE PACKAGE, ON & OFF THE COURT

Starting in 2027, we become the Official Footwear Partner of the ATP for three years. This partnership goes beyond sponsorship:

- On-court presence  We will equip ATP umpires, physios and officials at every level of ATP tournament.

- Opening the door for more players  Any ATP player without a current footwear contract will have the opportunity to be equipped by K-Swiss.

- A capsule collection  Five ATP-branded tennis shoes, co-designed for performance, launching in 2027 and sold globally through K-Swiss and through official ATP retail channels.

BUILT WITH PLAYERS, FOR PLAYERS

PERFORMANCE INNOVATION, PROVEN ON TOUR

We already outfit ATP players including Andrey Rublev, Tomás Martín Etcheverry, Thiago Agustín Tirante and Zhizhen Zhang. Every model is developed in close collaboration with athletes, from the Hypercourt Supreme 3, built for all-around performance with a carbon plate, to the K-Frame Speed, engineered for ankle support and quick lateral movement.

This partnership extends that connection to the entire ATP Tour, bringing decades of footwear expertise to more players, more courts, and more fans around the world.

Since 1966, tennis has been our obsession. This partnership with the ATP is just the beginning. 


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