Adidas Women's Ultraboost 21 Shoe Black
These women's running shoes are designed for comfort and responsiveness. They have a Linear Energy Push system that increases forefoot and midfoot stiffness for an extra energy push in each step. Responsive Boost cushioning returns energy to your stride. These shoes are made with Primeblue, a high-performance recycled material containing Parley Ocean Plastic and a minimum of 90% recycled material in total.
We don't want you to choose the wrong size when you order online. So, to make things a little easier for you we created simple, easy-to-read size charts to find the right size for any Adidas product.
Not the right fit? Changed your mind? No worries. Return your gear in unused condition within 365 days for a full refund or store credit — no fuss, no pressure.
| US - MEN | US - WOMEN | CM | UK | EUROPE |
|---|---|---|---|---|
| 4 | 5 | 22.1 cm | 3.5 | 36 |
| 4.5 | 5.5 | 22.5 cm | 4 | 36 2/3 |
| 5 | 6 | 22.9 cm | 4.5 | 37 1/3 |
| 5.5 | 6.5 | 23.3 cm | 5 | 38 |
| 6 | 7 | 23.8 cm | 5.5 | 38 2/3 |
| 6.5 | 7.5 | 24.2 cm | 6 | 39 1/3 |
| 7 | 8 | 24.6 cm | 6.5 | 40 |
| 7.5 | 8.5 | 25.0 cm | 7 | 40 2/3 |
| 8 | 9 | 25.5 cm | 7.5 | 41 1/3 |
| 8.5 | 9.5 | 25.9 cm | 8 | 42 |
| 9 | 10 | 26.3 cm | 8.5 | 42 2/3 |
| 9.5 | 10.5 | 26.7 cm | 9 | 43 1/3 |
| 10 | 11 | 27.1 cm | 9.5 | 44 |
| 10.5 | 11.5 | 27.6 cm | 10 | 44 2/3 |
| 11 | 12 | 28.0 cm | 10.5 | 45 1/3 |
| 11.5 | 12.5 | 28.4 cm | 11 | 46 |
| 12 | 13 | 28.8 cm | 11.5 | 46 2/3 |
| 12.5 | 13.5 | 29.3 cm | 12 | 47 1/3 |
| 13 | 14 | 29.7 cm | 12.5 | 48 |
| 13.5 | 14.5 | 30.1 cm | 13 | 48 2/3 |
| 14 | 15 | 30.5 cm | 13.5 | 49 1/3 |
| 14.5 | 15.5 | 31 cm | 14 | 50 |
| 15 | 31.4 cm | 14.5 | 50 2/3 | |
| 16 | 31.8 cm | 15 | 51 1/3 |
Adidas Women's Ultraboost 21 Shoe Black
These women's running shoes are designed for comfort and responsiveness. They have a Linear Energy Push system that increases forefoot and midfoot stiffness for an extra energy push in each step. Responsive Boost cushioning returns energy to your stride. These shoes are made with Primeblue, a high-performance recycled material containing Parley Ocean Plastic and a minimum of 90% recycled material in total.
We don't want you to choose the wrong size when you order online. So, to make things a little easier for you we created simple, easy-to-read size charts to find the right size for any Adidas product.
Not the right fit? Changed your mind? No worries. Return your gear in unused condition within 365 days for a full refund or store credit — no fuss, no pressure.
| US - MEN | US - WOMEN | CM | UK | EUROPE |
|---|---|---|---|---|
| 4 | 5 | 22.1 cm | 3.5 | 36 |
| 4.5 | 5.5 | 22.5 cm | 4 | 36 2/3 |
| 5 | 6 | 22.9 cm | 4.5 | 37 1/3 |
| 5.5 | 6.5 | 23.3 cm | 5 | 38 |
| 6 | 7 | 23.8 cm | 5.5 | 38 2/3 |
| 6.5 | 7.5 | 24.2 cm | 6 | 39 1/3 |
| 7 | 8 | 24.6 cm | 6.5 | 40 |
| 7.5 | 8.5 | 25.0 cm | 7 | 40 2/3 |
| 8 | 9 | 25.5 cm | 7.5 | 41 1/3 |
| 8.5 | 9.5 | 25.9 cm | 8 | 42 |
| 9 | 10 | 26.3 cm | 8.5 | 42 2/3 |
| 9.5 | 10.5 | 26.7 cm | 9 | 43 1/3 |
| 10 | 11 | 27.1 cm | 9.5 | 44 |
| 10.5 | 11.5 | 27.6 cm | 10 | 44 2/3 |
| 11 | 12 | 28.0 cm | 10.5 | 45 1/3 |
| 11.5 | 12.5 | 28.4 cm | 11 | 46 |
| 12 | 13 | 28.8 cm | 11.5 | 46 2/3 |
| 12.5 | 13.5 | 29.3 cm | 12 | 47 1/3 |
| 13 | 14 | 29.7 cm | 12.5 | 48 |
| 13.5 | 14.5 | 30.1 cm | 13 | 48 2/3 |
| 14 | 15 | 30.5 cm | 13.5 | 49 1/3 |
| 14.5 | 15.5 | 31 cm | 14 | 50 |
| 15 | 31.4 cm | 14.5 | 50 2/3 | |
| 16 | 31.8 cm | 15 | 51 1/3 |
10,000+ Reasons to Give Us a Try
At Adventureco, we stand behind every product we sell. That’s why you’re covered by our 365-Day Return Policy — with free returns within Australia.
Not the right fit? Changed your mind? No worries. Return your gear in unused condition within 365 days for a full refund or store credit — no fuss, no pressure.
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