Adidas Ultraboost 23 vs Converse Chuck 70 Sizing
Adidas Ultraboost 23 vs Converse Chuck 70: side-by-side fit, toe-box width and the exact size to order in each — Converse Chuck 70 runs bigger. Free interactive sizing comparison.
Should you size down from the Adidas Ultraboost 23 to the Converse Chuck 70?
Yes — size down a half size. If you wear a US 10 in the Ultraboost 23, order about a US 9.5 in the Chuck 70.
How they compare
Adidas Ultraboost 23 → Converse Chuck 70: The Adidas Ultraboost 23 runs true to size and has a slightly wider toe box compared to the Converse Chuck 70. If you wear a US 10 in the Ultraboost 23, your target size for the Chuck 70 is US 9.5.
Converse Chuck 70 → Adidas Ultraboost 23: The Converse Chuck 70 runs about a half-size large and has a slightly narrower toe box compared to the Adidas Ultraboost 23. If you wear a US 10 in the Chuck 70, your target size for the Ultraboost 23 is US 10.5.
Spec comparison
| Spec | Adidas Ultraboost 23 | Converse Chuck 70 |
|---|---|---|
| Length Fit | True to Size | Runs Large (~½ size) |
| Toe Box Profile | Wide | Standard |
| Arch Support | High | None |
| Upper Material | Primeknit Textile | Canvas |
Size conversion: Adidas Ultraboost 23 → Converse Chuck 70
If you wear these US sizes in the Ultraboost 23, here is the size to order in the Chuck 70.
| Your US size in Ultraboost 23 | Recommended Chuck 70 size |
|---|---|
| US 8 | US 7.5 |
| US 9 | US 8.5 |
| US 10 | US 9.5 |
| US 11 | US 10.5 |
| US 12 | US 11.5 |
Frequently asked questions
Which runs bigger, the Adidas Ultraboost 23 or the Converse Chuck 70?
The Converse Chuck 70 runs longer than the Adidas Ultraboost 23. The Ultraboost 23 is the snugger of the two, so you may want extra length going the other way.
If I wear a US 10 in the Ultraboost 23, what size is the Chuck 70?
Target a US 9.5 in the Chuck 70. A US 9 in the Ultraboost 23 maps to about US 8.5, and a US 11 to about US 10.5.
Is the Ultraboost 23 wider than the Chuck 70?
The Adidas Ultraboost 23 has a slightly wider toe box versus the Converse Chuck 70 (wide vs standard). Forefoot room is one of the biggest reasons two shoes at the same length still feel different.
How do the Ultraboost 23 and Chuck 70 compare on support and material?
The Ultraboost 23 pairs high arch support with a primeknit textile upper; the Chuck 70 has none support and a canvas upper.
Try it: adjust the size and compare live
Verdict
The Adidas Ultraboost 23 runs true to size and has a slightly wider toe box compared to the Converse Chuck 70. If you wear a US 10 in the Ultraboost 23, your target size for the Chuck 70 is US 9.5.
| Spec | Adidas Ultraboost 23 | Converse Chuck 70 |
|---|---|---|
| Length Fit | True to Size | Runs Large (~½ size) |
| Toe Box Profile | Wide | Standard |
| Arch Support | High | None |
| Upper Material | Primeknit Textile | Canvas |