Ninety Union
Women’s shoe size guide
Measure both feet, use the longer measurement, and review each style’s fit note before ordering.
Effective August 8, 2026Shoe conversion chart
| US | EU | UK | Foot length |
|---|---|---|---|
| 4 | 34–35 | 2 | 8.3 in / 21.1 cm |
| 5 | 35–36 | 3 | 8.7 in / 22.1 cm |
| 6 | 36–37 | 4 | 9.0 in / 22.9 cm |
| 7 | 37–38 | 5 | 9.3 in / 23.7 cm |
| 8 | 38–39 | 6 | 9.7 in / 24.6 cm |
| 9 | 39–40 | 7 | 10.0 in / 25.4 cm |
| 10 | 40–41 | 8 | 10.3 in / 26.2 cm |
| 11 | 41–42 | 9 | 10.7 in / 27.1 cm |
| 12 | 42–43 | 10 | 11.0 in / 27.9 cm |
| 13 | 43–44 | 11 | 11.3 in / 28.7 cm |
| 14 | 44–45 | 12 | 11.7 in / 29.7 cm |
Ninety Union shoes are offered in whole US sizes 4–14. Manufacturer construction can vary by style.
How to measure
- Stand on a sheet of paper with your weight evenly distributed.
- Mark the back of the heel and the tip of the longest toe.
- Measure both feet and use the longer measurement.
- Measure near the end of the day and with the hosiery you plan to wear.
Between sizes?
For pointed-toe pumps or a wider foot, the next full size up may be more comfortable. For open sandals, begin with your usual size unless the product fit note says otherwise.