Glycerin 23
Fit verdict, size conversion guide, and millimeter measurements.
This shoe runs approximately 1.6mm shorter than standard sizing. If you are between sizes or prefer a relaxed fit, go a half size up.
Aggregated feedback from verified shoe owners
| EU | US (M) | UK | Foot Length | Cavity Length |
|---|---|---|---|---|
| 40 | 7 | 6.5 | 25.1 cm | 265.44 mm |
| 40.5 | 7.5 | 7 | 25.4 cm | 268.44 mm |
| 41 | 8 | 7.5 | 25.7 cm | 271.44 mm |
| 41.5 | 8.5 | 8 | 26.1 cm | 275.44 mm |
| 42 | 9 | 8.5 | 26.4 cm | 278.44 mm |
| 42.5 | 9.5 | 9 | 26.7 cm | 281.44 mm |
| 43 | 10 | 9.5 | 27.1 cm | 285.44 mm |
| 43.5 | 10.5 | 10 | 27.4 cm | 288.44 mm |
| 44 | 11 | 10.5 | 27.7 cm | 291.44 mm |
| 44.5 | 11.5 | 11 | 28.1 cm | 295.44 mm |
| 45 | 12 | 11.5 | 28.4 cm | 298.44 mm |
| 45.5 | 12.5 | 12 | 28.7 cm | 301.44 mm |
| 46 | 13 | 12.5 | 29.1 cm | 305.44 mm |
| 47 | 14 | 13.5 | 29.7 cm | 311.44 mm |
Does the Brooks Glycerin 23 run big or small?
It tends to run slightly small. We recommend going a half size up for the best fit. This shoe runs approximately 1.6mm shorter than standard sizing. If you are between sizes or prefer a relaxed fit, go a half size up.
How does Shoe Fit determine shoe sizing?
Shoe Fit calculates the real-world interior shoe cavity in millimeters combined with real owner feedback, rather than relying on arbitrary brand charts.
Already own a shoe that fits well? Shoe Fit cross-references its internal cavity against the Brooks Glycerin 23 to give you your personalized size.
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