Use the KEEN Utility sizing information below to help select the best work-boot size. KEEN publishes separate men's and women's footwear charts, including U.S., UK, EU, and heel-to-toe measurements. Product-specific size and width availability may vary by style.
KEEN Utility Men's Boots
Use heel-to-toe measurement as the primary sizing guide. KEEN Utility men's work footwear typically uses a secure heel fit with additional room through the toe box for natural toe movement.
| US Men's Size | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 13 | 14 | 15 | 16 | 17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UK | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 12 | 13 | 14 | 15 | 16 |
| EU | 39.5 | 40 | 40.5 | 41 | 42 | 42.5 | 43 | 44 | 44.5 | 45 | 46 | 47 | 47.5 | 48 | 48.5 | 49 |
| Heel-to-Toe (cm) | 24.4 | 24.8 | 25.4 | 25.7 | 26.0 | 26.7 | 27.0 | 27.3 | 27.9 | 28.3 | 28.6 | 29.4 | 30.2 | 31.0 | 31.8 | 32.6 |
KEEN Utility fit: KEEN's work footwear is designed to keep the heel secure while giving the toes room to spread and flex naturally.
Widths: Many KEEN Utility men's styles are available in Regular and Wide. Width availability varies by individual work boot.
KEEN Utility Women's Boots
KEEN Utility women's work boots use women's-specific sizing and fit. KEEN designs its women's work footwear around differences in women's foot shape and biomechanics rather than simply downsizing a men's boot.
| US Women's Size | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UK | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 |
| EU | 35 | 35.5 | 36 | 37 | 37.5 | 38 | 38.5 | 39 | 39.5 | 40 | 40.5 | 41 | 42 | 43 |
| Heel-to-Toe (cm) | 21.6 | 22.2 | 22.5 | 23.0 | 23.5 | 23.8 | 24.1 | 24.6 | 25.1 | 25.4 | 25.9 | 26.2 | 26.7 | 27.6 |
Women's-specific fit: KEEN Utility designs many women's work boots specifically around a woman's foot, including differences in heel shape, foot volume, and biomechanics.
Widths: Regular and Wide widths are available on many women's KEEN Utility styles. Use the width options shown on the individual product as the final reference.
KEEN Utility Work-Boot Fit Guide
KEEN Utility adapts its hiking-inspired footwear fit for the work environment, combining a secure heel with room through the forefoot and toe box.
| Fit Area | What to Expect |
|---|---|
| Heel | KEEN Utility uses a snug heel cup designed to help keep the heel secure while walking and working. |
| Toe Box | Many KEEN Utility boots provide additional room through the forefoot so toes can spread and flex naturally. |
| Safety Toe | KEEN Utility offers steel, aluminum, carbon-fiber, composite, and other protective-toe constructions depending on the style. Toe-box feel may differ between constructions even in the same numerical size. |
| Width | If the length feels correct but the boot feels tight across the forefoot, choose Wide when available rather than automatically increasing the shoe size. |
| Work Socks | Check fit using the type and thickness of socks normally worn on the job, especially with insulated work boots. |
How to Measure Your Foot
1. Measure both feet: Measure from the back of the heel to the end of the longest toe.
2. Use the larger foot: If one foot is longer, use that measurement when comparing to the chart.
3. Check length in centimeters: KEEN recommends comparing heel-to-toe measurement to its size chart rather than relying only on a men's-to-women's conversion.
4. Consider width separately: Length and width are different fit considerations. Use a Wide option when available if the boot feels tight across the forefoot but the length is correct.
Sizing and fit information formatted from current KEEN manufacturer sizing and KEEN Utility fit guidance. Product-specific sizes, widths, and fit may vary by style. Sources: KEEN Utility Fit to Work and current KEEN manufacturer footwear size charts.