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Boston

Optimal Fit In Two Widths

For your comfort and support, we offer our original footbed in two widths: 'Regular' for normal to wide feet and 'Narrow' for slimmer feet.

The width of your Birkenstocks is indicated by the footprint shape next to the size.

Choosing the correct fit will keep your feet happy, prevent pressure or rubbing in the wrong places and extend the lifespan of your shoes.

Most people with a normal to wide foot will be comfortable in a Regular width fitting.
If you usually seek a narrow fitting shoe or have a particularly slim foot shape, the Narrow width may be more suitable for you.

Size chart

These measurements are footbed dimensions.

We recommend choosing a footbed size by adding 10mm to the length of your foot, and selecting narrow or regular based on your foot width.

Adults

Size Length Width
35 Regular 225mm 89mm
36 Regular 230mm 91mm
37 Regular 240mm 93mm
38 Regular 245mm 95mm
39 Regular 250mm 97mm
40 Regular 260mm 99mm
41 Regular 265mm 101mm
42 Regular 270mm 102mm
43 Regular 280mm 103mm
44 Regular 285mm 107mm
45 Regular 290mm 109mm
46 Regular 300mm 113mm
47 Regular 305mm 115mm
48 Regular 310mm 117mm
49 Regular 315mm 119mm
50 Regular 325mm 121mm

Kids

Size Length Width
25 Regular 160mm 69mm
26 Regular 165mm 71mm
27 Regular 170mm 73mm
28 Regular 180mm 75mm
29 Regular 185mm 77mm
30 Regular 190mm 79mm
31 Regular 200mm 81mm
32 Regular 205mm 83mm
33 Regular 210mm 85mm
34 Regular 220mm 87mm
35 Regular 225mm 89mm
36 Regular 230mm 91mm
37 Regular 240mm 93mm
38 Regular 245mm 95mm
39 Regular 250mm 97mm

Adults

Size Length Width
35 Narrow 225mm 85mm
36 Narrow 230mm 87mm
37 Narrow 240mm 89mm
38 Narrow 245mm 91mm
39 Narrow 250mm 93mm
40 Narrow 260mm 95mm
41 Narrow 265mm 97mm
42 Narrow 270mm 99mm
43 Narrow 280mm 101mm
44 Narrow 285mm 103mm
45 Narrow 290mm 105mm
46 Narrow 300mm 107mm
47 Narrow 305mm 109mm
48 Narrow 310mm 111mm
49 Narrow 315mm 113mm
50 Narrow 325mm 115mm

Kids

Size Length Width
24 Narrow 150mm 63mm
25 Narrow 160mm 65mm
26 Narrow 165mm 67mm
27 Narrow 170mm 69mm
28 Narrow 180mm 71mm
29 Narrow 185mm 73mm
30 Narrow 190mm 75mm
31 Narrow 200mm 77mm
32 Narrow 205mm 79mm
33 Narrow 210mm 81mm
34 Narrow 220mm 83mm
35 Narrow 225mm 85mm
36 Narrow 230mm 87mm
37 Narrow 240mm 89mm
38 Narrow 245mm 91mm
39 Narrow 250mm 93mm