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Why run when you can fly? Designed for record breakers in the making, the Nike Sonic Fly (Grade School) pairs a lightweight design with soft, springy foam that helps add energy to every stride.
Responsive Cushioning
We packed the midsole with soft and springy foam that absorbs impact and adds energy to every stride you take.
Lightweight But Durable
Less weight means more speed. Mesh throughout the upper helps keep these shoes lightweight and breathable. We reinforced the toe and sides for added durability.
Support You Can Feel
Bands at the side of your feet work with the laces to add stability and a secure feel.
Traction That Keeps Up
Rubber outsole with Waffle-inspired tread pattern helps provide durable traction.
More Details
| US | EUR | UK | JPN (cm) |
|---|---|---|---|
| 7.5 | 40.5 | 6.5 | 25.5 |
| 8 | 41 | 7 | 26 |
| 8.5 | 42 | 7.5 | 26.5 |
| 9 | 42.5 | 8 | 27 |
| 9.5 | 43 | 8.5 | 27.5 |
| 10 | 44 | 9 | 28 |
| 10.5 | 44.5 | 9.5 | 28.5 |
| 11 | 45 | 10 | 29 |
| 11.5 | 45.5 | 10.5 | 29.5 |
| 12 | 46 | 11 | 30 |
| 13 | 47.5 | 12 | 31 |
| 14 | 48.5 | 13 | 32 |
| 15 | 49.5 | 14 | 33 |
| CM | US |
| 13.3 cm | 6C |
| 14.2 cm | 7C |
| 15 cm | 8C |
| 15.9 cm | 9C |
| 16.7 cm | 10C |
| 17.6 cm | 11C |
| 18.4 cm | 12C |
| 19.3 cm | 13C |
| 20.1 cm | 1Y |
| 20.8 cm | 2Y |
| 21.6 | 3y |
| US | EUR | UK | JPN (cm) |
| 5 | 35.5 | 2.5 | 22 |
| 5.5 | 36 | 3 | 22.5 |
| 6 | 36.5 | 3.5 | 23 |
| 6.5 | 37.5 | 4 | 23.5 |
| 7 | 38 | 4.5 | 24 |
| 7.5 | 38.5 | 5 | 24.5 |
| 8 | 39 | 5.5 | 25 |
| 8.5 | 40 | 6 | 25.5 |
| 9 | 40.5 | 6.5 | 26 |
| 9.5 | 41 | 7 | 26.5 |
| 10 | 42 | 7.5 | 27 |
| Size | CHEST (cm) | WAIST (cm) | HIP (cm) | Height (cm) |
|---|---|---|---|---|
| XS | 80 โ 88โณ | 65 โ 73โณ | 80 โ 88โณ | 170 โ 183 |
| S | 88 โ 96โณ | 73 โ 81โณ | 88 โ 96โณ | 170 โ 183 |
| M | 37 โ 40โณ | 81 - 89โณ | 96 - 104โณ | 170 โ 183 |
| L | 40 โ 44โณ | 89 - 97โณ | 104 - 112โณ | 170 โ 183 |
| XL | 44 โ 48โณ | 97 - 109โณ | 112 - 120โณ | 170 โ 183 |
| 2XL | 48 โ 52โณ | 109 - 121โณ | 120 - 128โณ | 170 โ 183 |
| Size | BUST | WAIST | HIP |
|---|---|---|---|
| XXS | 70 - 76โณ | 54 - 60โณ | 78 - 84โณ |
| XS | 76 - 83โณ | 60 - 67โณ | 84 - 91โณ |
| S | 83 - 90โณ | 67 - 74โณ | 91 -98โณ |
| M | 90 - 97โณ | 74 โ 81โณ | 98 โ 105โณ |
| L | 97 โ 104โณ | 81 โ 88โณ | 105 โ 112โณ |
| XL | 104 โ 114โณ | 88 โ 98โณ | 112 โ 120โณ |
| 2XL | 114 โ 124โณ | 98 โ 108โณ | 120 โ 128โณ |
| Size | Numeric Size | Age | Height (cm) | Chest (cm) | Waist (cm) | Hip (cm) |
|---|---|---|---|---|---|---|
| XS | 6 - 7 | 7 - 8 | 122 - 128 | 64.5 - 66 | 59.5 - 61.5 | 68.5 - 71 |
| S | 8 - 9 | 8 - 10 | 128 - 137 | 66 - 69 | 61.5 - 65 | 71 - 74.5 |
| M | 10 - 12 | 10 - 12 | 137 - 147 | 69 - 75 | 65 - 69 | 74.5 - 79.5 |
| L | 14 - 16 | 12 - 13 | 147 - 158 | 75 - 81.5 | 69 - 72.5 | 79.5 - 84.5 |
| XL | 18 - 20 | 13 - 15 | 158 - 170 | 81.5 - 88.5 | 72.5 - 75.5 | 84.5 - 89.5 |
| XS | < 29 | < 35 | 32 | 34 | 30 |
|---|---|---|---|---|---|
| S | 29โ32 | 35โ37.5 | 32.25 | 34.25 | 30.25 |
| M | 32โ35 | 37.5โ41 | 32.5 | 34.5 | 30.5 |
| L | 35โ38 | 41โ44 | 32.75 | 34.75 | 30.75 |
| XL | 38โ43 | 44โ47 | 33 | 35 | 31 |
| XXL | 43โ47.5 | 47โ50.5 | 33.25 | 35.25 | 31.25 |
| XXXL | 47.5โ52.5 | 50.5โ53.5 | 33.5 | 35.5 | 31.5 |
| XS | 0โ2 | 23.5โ26 | 33โ35.5 | 31.2 | 33.25 | 29.25 |
|---|---|---|---|---|---|---|
| S | 4โ6 | 26โ29 | 35.5โ38.5 | 31.2 | 33.25 | 29.25 |
| M | 8โ10 | 29โ31.5 | 38.5โ41 | 31.5 | 33.5 | 29.5 |
| L | 12โ14 | 31.5โ34.5 | 41โ44 | 31.5 | 33.5 | 29.5 |
| XL | 16โ18 | 34.5โ38.5 | 44โ47 | 31.75 | 33.75 | 29.75 |
| XXL | 20โ22 | 38.5โ42.5 | 47โ50 | 31.75 | 33.75 | 29.75 |
| SIZE | 30 | 32 | 34 | 36 | 38 |
| A | XS | XS | S | M | L |
| B | |||||
| C | S | ||||
| D | M | L | XL | ||
| DD | |||||
| E |

