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A special Grey Days 2026 edition of the 2010, this versatile runner combines a supportive, tech-inspired upper with extra cushioning underfoot to help you keep up with your active lifestyle.
Size conversions may vary per brand and style and may not fully match the conversions shown below. If you are not sure about your size, please contact us for assistance. info@extrabutterny.com
Our standard sizing runs in US Sizing
Unisex is typically in US Mens Sizing unless stated otherwise.
| US Men | US Women | UK | EU | Length (cm) |
| 1 | - | .5 | 32.5 | 19 |
| 1.5 | 3 | 1 | 33 | 19.5 |
| 2 | 3.5 | 1.5 | 33.5 | 20 |
| 2.5 | 4 | 2 | 34.5 | 20.5 |
| 3 | 4.5 | 2.5 | 35 | 21 |
| 3.5 | 5 | 3 | 35.5 | 21.5 |
| 4 | 5.5 | 3.5 | 36 | 22 |
| 4.5 | 6 | 4 | 37 | 22.5 |
| 5 | 6.5 | 4.5 | 37.5 | 23 |
| 5.5 | 7 | 5 | 38 | 23.5 |
| 6 | 7.5 | 5.5 | 38.5 | 24 |
| 6.5 | 8 | 6 | 39.5 | 24.5 |
| 7 | 8.5 | 6.5 | 40 | 25 |
| 7.5 | 9 | 7 | 40.5 | 25.5 |
| 8 | 9.5 | 7.5 | 41.5 | 26 |
| 8.5 | 10 | 8 | 42 | 26.5 |
| 9 | 10.5 | 8.5 | 42.5 | 27 |
| 9.5 | 11 | 9 | 43 | 27.5 |
| 10 | 11.5 | 9.5 | 44 | 28 |
| 10.5 | 12 | 10 | 44.5 | 28.5 |
| 11 | 12.5 | 10.5 | 45 | 29 |
| 11.5 | 13 | 11 | 45.5 | 29.5 |
| 12 | 13.5 | 11.5 | 46.5 | 30 |
| 12.5 | 14 | 12 | 47 | 30.5 |
| 13 | 15 | 12.5 | 47.5 | 31 |
| 14 | - | 13.5 | 49 | 32 |
| 15 | - | 14.5 | 50 | 33 |
We need to empty your cart before you can proceed. You will be able to continue shopping as usual after you complete the raffle checkout.