Birkenstock Adult Narrow Fit Size Chart
NOTE: These measurements are footbed dimensions.
We recommend choosing a footbed size by adding 10mm to the length of your foot, and selecting narrow or Narrow based on your foot width.
| 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 |