Tool
Work boot size and width converter
Enter a size and a width letter. See the common equivalents in the other systems, and what to try when moving between men's and women's boots.
Short answer
US women's is about US men's plus 1.5. UK is about US men's minus 1. A women's foot in a men's boot usually goes down 1.5 sizes and about two width letters, so a women's 9 D is close to a men's 7.5 B. Brands differ, so confirm on the brand's own chart.
Convert your size
- US men's
- 7.5
- US women's
- 9
- EU
- 40.5approx.
- UK
- 6.5approx.
Width in the other system
Women's D is about men's B (narrow), two letters down from D.
Moving to a men's boot: try men's 7.5and go down about two width letters. For example, women's 9 D is about men's 7.5 B.
US women's = men's + 1.5 is the common rule; some brands use + 1 or + 2. Sizing and width names differ by brand and last. Check the brand's chart and try boots on with your work socks.
Common US men's to EU sizes
6
- US women's
- 7.5
- EU
- 39
- UK
- 5
7
- US women's
- 8.5
- EU
- 40
- UK
- 6
8
- US women's
- 9.5
- EU
- 41
- UK
- 7
9
- US women's
- 10.5
- EU
- 42
- UK
- 8
10
- US women's
- 11.5
- EU
- 43
- UK
- 9
11
- US women's
- 12.5
- EU
- 44
- UK
- 10
12
- US women's
- 13.5
- EU
- 45
- UK
- 11
13
- US women's
- 14.5
- EU
- 46
- UK
- 12
14
- US women's
- 15.5
- EU
- 47
- UK
- 13
15
- US women's
- 16.5
- EU
- 48
- UK
- 14
| US men's | US women's | EU | UK |
|---|---|---|---|
| 6 | 7.5 | 39 | 5 |
| 7 | 8.5 | 40 | 6 |
| 8 | 9.5 | 41 | 7 |
| 9 | 10.5 | 42 | 8 |
| 10 | 11.5 | 43 | 9 |
| 11 | 12.5 | 44 | 10 |
| 12 | 13.5 | 45 | 11 |
| 13 | 14.5 | 46 | 12 |
| 14 | 15.5 | 47 | 13 |
| 15 | 16.5 | 48 | 14 |
Width letters
Narrow
- Men's
- B
- Women's
- AA
Medium (regular)
- Men's
- D
- Women's
- B
Wide
- Men's
- E or EE
- Women's
- C or D
Extra wide
- Men's
- EEE
- Women's
- E or EE
Extra-extra wide
- Men's
- 4E (EEEE), some 6E
- Women's
- rarely made
| Fit | Men's | Women's |
|---|---|---|
| Narrow | B | AA |
| Medium (regular) | D | B |
| Wide | E or EE | C or D |
| Extra wide | EEE | E or EE |
| Extra-extra wide | 4E (EEEE), some 6E | rarely made |
The same letter means a different width in men's and women's boots, because the two are built on different lasts. A women's foot in a men's boot usually goes down about 1.5 sizes and about two width letters. Fit checks are explained in fit and sizing.
- 1Toe room: about a thumb width ahead of the longest toe
- 2Toes clear the cap edge: no pressure when you stand or crouch
- 3Widest point at the ball: the ball of the foot sits where the boot is widest
- 4Minimal heel lift: a little lift is normal in new stiff boots