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We welcome the newest addition to the SI-18 family, the Si-2018 Fusion Leather.
This refreshing update to a 1989 classic is the only pair of shoes that truly unites tennis roots with street-wear to create that unique look.
Its classic-style leather vamp is perforated for venting while its leather heel counter features an oversized 3D printed K-Swiss wordmark for a bold, modern look. A medial side 5 stripes detail in elastic webbing contributes to form and function, crossing over the tongue and under the lace-up to add stretch, stability and support.
K-Swiss’ signature Aösta 7.0 high-density rubber is used to create the Si-2018 Fusion L’s reinforced toe bumper and durable outsole with deep herringbone tread, for a unique sneaker that bridges tennis-specific technology with street style looks.
| 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 | ||||||
