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PERFORMANCE TENNIS HERITAGE
WITH THE REISSUE OF THE SI-DEFIER 7.0

Join us in celebrating the style that was historically made popular by some of the most talented athletes nearly two decades ago. Originally worn exclusively by the championship doubles team at the 2000 French Open, the Si-Defier was part of the innovative 7.0 system.

Available in multiple color ways for men and women.

Scroll down to learn more

Learn the si-defier history
from the design team

PERFORMANCE TENNIS HERITAGE
WITH THE REISSUE OF THE SI-DEFIER 7.0

Join us in celebrating the style that was historically made popular by some of the most talented athletes nearly two decades ago. Originally worn exclusively by the championship doubles team at the 2000 French Open, the Si-Defier was part of the innovative 7.0 system.

Available in multiple color ways for men and women.

Scroll down to learn more

Learn the si-defier history
from the design team

PERFORMANCE TENNIS HERITAGE
WITH THE REISSUE OF THE SI-DEFIER 7.0

Join us in celebrating the style that was historically made popular by some of the most talented athletes nearly two decades ago. Originally worn exclusively by the championship doubles team at the 2000 French Open, the Si-Defier was part of the innovative 7.0 system.

Available in multiple color ways for men and women.

Scroll down to learn more

Learn the si-defier history from the design team

PERFORMANCE TENNIS HERITAGE
WITH THE REISSUE OF THE SI-DEFIER 7.0

Join us in celebrating the style that was historically made popular by some of the most talented athletes nearly two decades ago. Originally worn exclusively by the championship doubles team at the 2000 French Open, the Si-Defier was part of the innovative 7.0 system.

Available in multiple color ways for men and women.

Scroll down to learn more

Learn the si-defier history
from the design team

Size Chart
Adult and Big-Kids
Gen Men Women Big-Kids
CM US UK EUR US UK EUR US UK EUR
20 1 13.5 32.5
20.25 1.5 1 33
20.5 2 1.5 33.5
21 4 2 34.5 2.5 2 34
21.5 4.5 2.5 35 3 2.5 35
22 5 3 35.5 3.5 3 35.5
22.5 4.5 3.5 37 5.5 3.5 36 4 3.5 36
23 5 4 37.5 6 4 37 4.5 4 37
23.5 5.5 4.5 38 6.5 4.5 37.5 5 4.5 37.5
24 6 5 38.5 7 5 38 5.5 5 38
24.5 6.5 5.5 39 7.5 5.5 39 6 5.5 39
25 7 6 39.5 8 6 39.5 6.5 6 39.5
25.5 7.5 6.5 40 8.5 6.5 40 7 6.5 40
26 8 7 41 9 7 41
26.5 8.5 7.5 41.5 9.5 7.5 41.5
27 9 8 42 10 8 42
27.5 9.5 8.5 42.5 10.5 8.5 42.5
28 10 9 43 11 9 43
28.5 10.5 9.5 44
29 11 10 44.5 12 10 44.5
29.5 11.5 10.5 45
30 12 11 46
30.5 12.5 11.5 46.5
31 13 12 47
32 14 13 49
32.5 15 14 50
Kids
Gen Big-Kids Little-Kids Toddlers
CM US UK EUR US UK EUR US UK EUR
9.5 2 1.5 17
10.5 3 2.5 18.5
11.5 4 3.5 19.5
12 4.5 4 20
12.5 5 4.5 21
12.75 5.5 5 21.5
13 6 5.5 22
13.5 6.5 6 23
14 7 6.5 23.5
14.5 7.5 7 24
15 8 7.5 25
15.25 8.5 8 25.5 8.5 8 25.5
15.5 9 8.5 26 9 8.5 26
16 9.5 9 27 9.5 9 27
16.5 10 9.5 27.5 10 9.5 27.5
17 10.5 10 28
17.5 11 10.5 28.5
17.75 11.5 11 29
18 12 11.5 29.5
18.5 12.5 12 30
19 13 12.5 31
19.5 13.5 13 32
20 1 13.5 32.5 1 13.5 32.5
20.25 1.5 1 33 1.5 1 33
20.5 2 1.5 33.5 2 1.5 33.5
21 2.5 2 34 2.5 2 34
21.5 3 2.5 35 3 2.5 35
22 3.5 3 35.5 3.5 3 35.5
22.5 4 3.5 36
23 4.5 4 37
23.5 5 4.5 37.5
24 5.5 5 38
24.5 6 5.5 39
25 6.5 6 39.5
25.5 7 6.5 40