Vans Authentic vs Adidas Ultraboost 23 Sizing
Vans Authentic vs Adidas Ultraboost 23: side-by-side fit, toe-box width and the exact size to order in each — they fit the same length. Free interactive sizing comparison.
Do the Vans Authentic and Adidas Ultraboost 23 take the same size?
Yes — keep your usual size. A US 10 in the Authentic is about a US 10 in the Ultraboost 23.
How they compare
Vans Authentic → Adidas Ultraboost 23: The Vans Authentic runs true to size and has a much narrower toe box compared to the Adidas Ultraboost 23. Your US 10 in the Authentic translates to the same size in the Ultraboost 23.
Adidas Ultraboost 23 → Vans Authentic: The Adidas Ultraboost 23 runs true to size and has a much wider toe box compared to the Vans Authentic. Your US 10 in the Ultraboost 23 translates to the same size in the Authentic.
Spec comparison
| Spec | Vans Authentic | Adidas Ultraboost 23 |
|---|---|---|
| Length Fit | True to Size | True to Size |
| Toe Box Profile | Narrow | Wide |
| Arch Support | None | High |
| Upper Material | Canvas | Primeknit Textile |
Size conversion: Vans Authentic → Adidas Ultraboost 23
If you wear these US sizes in the Authentic, here is the size to order in the Ultraboost 23.
| Your US size in Authentic | Recommended Ultraboost 23 size |
|---|---|
| US 8 | US 8 |
| US 9 | US 9 |
| US 10 | US 10 |
| US 11 | US 11 |
| US 12 | US 12 |
Frequently asked questions
Which runs bigger, the Vans Authentic or the Adidas Ultraboost 23?
The Vans Authentic and Adidas Ultraboost 23 fit the same in length — both are true to size — so you can keep your usual size moving between them.
If I wear a US 10 in the Authentic, what size is the Ultraboost 23?
Target a US 10 in the Ultraboost 23. A US 9 in the Authentic maps to about US 9, and a US 11 to about US 11.
Is the Authentic wider than the Ultraboost 23?
The Vans Authentic has a much narrower toe box versus the Adidas Ultraboost 23 (narrow vs wide). Forefoot room is one of the biggest reasons two shoes at the same length still feel different.
How do the Authentic and Ultraboost 23 compare on support and material?
The Authentic pairs none arch support with a canvas upper; the Ultraboost 23 has high support and a primeknit textile upper.
Try it: adjust the size and compare live
Verdict
The Vans Authentic runs true to size and has a much narrower toe box compared to the Adidas Ultraboost 23. Your US 10 in the Authentic translates to the same size in the Ultraboost 23.
| Spec | Vans Authentic | Adidas Ultraboost 23 |
|---|---|---|
| Length Fit | True to Size | True to Size |
| Toe Box Profile | Narrow | Wide |
| Arch Support | None | High |
| Upper Material | Canvas | Primeknit Textile |