Adidas Ultraboost 23 vs Jordan 4 Retro Sizing
Adidas Ultraboost 23 vs Jordan 4 Retro: side-by-side fit, toe-box width and the exact size to order in each — Adidas Ultraboost 23 runs bigger. Free interactive sizing comparison.
Should you size up from the Adidas Ultraboost 23 to the Jordan 4 Retro?
Yes — size up a half size. If you wear a US 10 in the Ultraboost 23, order about a US 10.5 in the 4 Retro.
How they compare
Adidas Ultraboost 23 → Jordan 4 Retro: The Adidas Ultraboost 23 runs true to size, similar in width to the Jordan 4 Retro. If you wear a US 10 in the Ultraboost 23, your target size for the 4 Retro is US 10.5.
Jordan 4 Retro → Adidas Ultraboost 23: The Jordan 4 Retro runs about a half-size small, similar in width to the Adidas Ultraboost 23. If you wear a US 10 in the 4 Retro, your target size for the Ultraboost 23 is US 9.5.
Spec comparison
| Spec | Adidas Ultraboost 23 | Jordan 4 Retro |
|---|---|---|
| Length Fit | True to Size | Runs Small (~½ size) |
| Toe Box Profile | Wide | Wide |
| Arch Support | High | Moderate |
| Upper Material | Primeknit Textile | Nubuck/Mesh |
Size conversion: Adidas Ultraboost 23 → Jordan 4 Retro
If you wear these US sizes in the Ultraboost 23, here is the size to order in the 4 Retro.
| Your US size in Ultraboost 23 | Recommended 4 Retro size |
|---|---|
| US 8 | US 8.5 |
| US 9 | US 9.5 |
| US 10 | US 10.5 |
| US 11 | US 11.5 |
| US 12 | US 12.5 |
Frequently asked questions
Which runs bigger, the Adidas Ultraboost 23 or the Jordan 4 Retro?
The Adidas Ultraboost 23 runs longer than the Jordan 4 Retro — it sits true to size while the other runs small, so size accordingly when moving between them.
If I wear a US 10 in the Ultraboost 23, what size is the 4 Retro?
Target a US 10.5 in the 4 Retro. A US 9 in the Ultraboost 23 maps to about US 9.5, and a US 11 to about US 11.5.
Is the Ultraboost 23 wider than the 4 Retro?
The Adidas Ultraboost 23 has a similar toe box width versus the Jordan 4 Retro (wide vs wide). Forefoot room is one of the biggest reasons two shoes at the same length still feel different.
How do the Ultraboost 23 and 4 Retro compare on support and material?
The Ultraboost 23 pairs high arch support with a primeknit textile upper; the 4 Retro has moderate support and a nubuck/mesh upper.
Try it: adjust the size and compare live
Verdict
The Adidas Ultraboost 23 runs true to size, similar in width to the Jordan 4 Retro. If you wear a US 10 in the Ultraboost 23, your target size for the 4 Retro is US 10.5.
| Spec | Adidas Ultraboost 23 | Jordan 4 Retro |
|---|---|---|
| Length Fit | True to Size | Runs Small (~½ size) |
| Toe Box Profile | Wide | Wide |
| Arch Support | High | Moderate |
| Upper Material | Primeknit Textile | Nubuck/Mesh |