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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
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
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
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
| Adult & Varsity | |||||||||
| Men | Women | Varsity | |||||||
| Length (in 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 & Toddlers | |||||||||
| Big Kids | Little Kids | Toddlers | |||||||
| Length (in 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 | ||||||
