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adidas Ultraboost 21 runs a little smaller, we recommend going up a half size for a regular fit.
Shop adidas X Stella McCartney Trainers
UK | EU | US | Heel-toe (cm) |
4 | 36 2/3 | 5.5 | 22.5 cm |
4.5 | 37 1/3 | 6 | 22.9 cm |
5 | 38 | 6.5 | 23.3 cm |
5.5 | 38 2/3 | 7 | 23.8 cm |
6 | 39 1/3 | 7.5 | 24.2 cm |
6.5 | 40 | 8 | 24.6 cm |
7 | 40 2/3 | 8.5 | 25 cm |
7.5 | 41 1/3 | 9 | 25.5 cm |
8 | 42 | 9.5 | 25.9 cm |
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] .
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