Birkenstock Size Guide & Width Fitting Chart (UK, EU & cm)
German brand Birkenstock moulds its orthopaedic cork footbeds to European sizing and offers two specific width fittings: Regular Fit and Narrow Fit. Use our conversion tables, footbed width definitions, and exact centimetre (cm) foot length measurements below to find your correct fit.
Birkenstock Sizing & Width Quick Reference:
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Birkenstock 37 in UK: EU 37 converts to UK 4.5 (24.0 cm foot length).
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Birkenstock 40 in UK: EU 40 converts to UK 7 (26.0 cm foot length).
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Birkenstock 41 in UK: EU 41 converts to UK 7.5 (26.5 cm foot length).
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Regular Fit (Outlined Footprint Icon): Designed for standard to wide feet (Irish/UK standard D to G width).
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Narrow Fit (Solid/Filled Footprint Icon): Designed for slim feet or women preferring a snug lateral fit.
Fitting Tip: Irish shoe sizes follow the UK scale. Birkenstock footbeds are intended to cradle the foot: your toes and heels should have a few millimetres of margin within the rim without resting on the outer edge.
Birkenstock Women's Size Conversion Chart
| UK Size |
Birkenstock EU |
Foot Length (cm) |
| 3.5 |
36 |
23.0 cm |
| 4.5 |
37 |
24.0 cm |
| 5 |
38 |
24.5 cm |
| 5.5 |
39 |
25.0 cm |
| 7 |
40 |
26.0 cm |
| 7.5 |
41 |
26.5 cm |
| 8 |
42 |
27.0 cm |
| 9 |
43 |
28.0 cm |
Birkenstock Men's Size Conversion Chart
| UK Size |
Birkenstock EU |
Foot Length (cm) |
| 7 |
40 |
26.0 cm |
| 7.5 |
41 |
26.5 cm |
| 8 |
42 |
27.0 cm |
| 9 |
43 |
28.0 cm |
| 9.5 |
44 |
28.5 cm |
| 10.5 |
45 |
29.5 cm |
| 11.5 |
46 |
30.0 cm |
| 12 |
47 |
30.5 cm |
| 13 |
48 |
31.0 cm |
| 14 |
49 |
32.0 cm |
How to Check Birkenstock Regular vs. Narrow Width
Look at the footprint stamped on the inner footbed or on the original box:
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Outlined Footprint (Regular Fit): Designed for medium to broad feet. This is the classic Birkenstock fit chosen by most men and women with wider arches.
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Solid Footprint (Narrow Fit): Designed for slim feet with less volume across the instep and narrower heels.
