Chuck Taylor All Star vs Jack Purcell
Both are Converse models but they fit differently: Jack Purcell runs about 0.5 size s larger than Chuck Taylor All Star at the same labelled US size.
At US men's 9 on Chuck Taylor All Star
If you wear Chuck Taylor All Star in US 9, start with Jack Purcell in US 8.5: go down 0.5 US sizes. The calculation keeps the same foot length anchor, about 254mm, then removes the Chuck Taylor All Star fit offset (-1) and applies the Jack Purcell fit offset (-0.5).
| Model | Recommended US | Foot mm | UK | EU | CM |
|---|---|---|---|---|---|
| Chuck Taylor All Star | 9 | 254 | 7 | 38 | 25.5 |
| Jack Purcell (equivalent) | 8.5 | 254 | 7 | 38 | 25.5 |