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adidas Ultraboost 21 runs a little smaller, we recommend going up a half size for a regular fit.
UK | EU | US |
4 | 36 2/3 | 5.5 |
4.5 | 37 1/3 | 6 |
5 | 38 | 6.5 |
5.5 | 38 2/3 | 7 |
6 | 39 1/3 | 7.5 |
6.5 | 40 | 8 |
7 | 40 2/3 | 8.5 |
7.5 | 41 1/3 | 9 |
8 | 42 | 9.5 |
For adidas trainers we generally recommend taking your usual trainer size, however, if intending to use for running, you may want to size up by half a size for a more comfortable fit.
If you have any questions or need help deciding, that’s what we’re here for! Please contact our customer service team who would be happy to assist - email us [email protected] or call us on 0203 793 0964.
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