True-to-Size Millimeter Sizing Comparison
New Balance 574 Core vs Nike Air Max Plus
Detailed size conversion chart, cavity measurements in millimeters, and crowd-sourced fit advice for choosing your perfect size.
Interactive Size Converter
Select what size you wear in the 574 Core to see your calculated size in the Air Max Plus.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| 574 Core (US) | Internal Cavity | Air Max Plus Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 2.5 | 220 mm | US 3.5 | 0% | +11.9 mm |
| US 3 | 225 mm | US 3.5 | 19% | +6.9 mm |
| US 3.5 | 230 mm | US 3.5 | 78% | +1.9 mm |
| US 4 | 235 mm | US 4 | 90% | +0.9 mm |
| US 4.5 | 240 mm | US 4.5 | 99% | -0.1 mm |
| US 5 | 245 mm | US 5 | 99% | -0.1 mm |
| US 5.5 | 250 mm | US 5.5 | 87% | -1.1 mm |
| US 6 | 255 mm | US 6.5 | 78% | +1.9 mm |
| US 6.5 | 260 mm | US 7 | 90% | +0.9 mm |
| US 7 | 265 mm | US 7.5 | 90% | +0.9 mm |
| US 7.5 | 270 mm | US 8 | 99% | -0.1 mm |
| US 8 | 275 mm | US 8.5 | 87% | -1.1 mm |
| US 8.5 | 280 mm | US 9 | 75% | -2.1 mm |
| US 9 | 285 mm | US 10 | 78% | +1.9 mm |
| US 9.5 | 290 mm | US 10.5 | 90% | +0.9 mm |
| US 10 | 295 mm | US 11 | 99% | -0.1 mm |
| US 10.5 | 300 mm | US 11.5 | 87% | -1.1 mm |
| US 11 | 305 mm | US 12 | 87% | -1.1 mm |
| US 11.5 | 310 mm | US 13 | 78% | +1.9 mm |
| US 12 | 315 mm | US 13.5 | 90% | +0.9 mm |
| US 12.5 | 320 mm | US 14 | 90% | +0.9 mm |
| US 13 | 325 mm | US 14.5 | 99% | -0.1 mm |
| US 13.5 | 330 mm | US 15 | 87% | -1.1 mm |
| US 14 | 335 mm | US 15.5 | 75% | -2.1 mm |
| US 15 | 345 mm | US 17 | 90% | +0.9 mm |
| US 16 | 355 mm | US 18 | 99% | -0.1 mm |
| US 17 | 365 mm | US 19.5 | 78% | +1.9 mm |
| US 18 | 375 mm | US 20.5 | 90% | +0.9 mm |
| US 19 | 385 mm | US 21.5 | 87% | -1.1 mm |
| US 20 | 395 mm | US 22 | 16% | -7.1 mm |
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Frequently Asked Questions
How does the 574 Core size compare to the Air Max Plus?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The 574 Core has an internal fit offset of -0.76mm compared to 0.12mm for the Air Max Plus.
Do these shoes fit wide feet comfortably?
The 574 Core has a snug/narrow width profile, while the Air Max Plus is roomy/wide.