Correct fit
Leave room in front of your toes
Your toes should not touch the front rim. A small gap allows movement when walking.
Birkenstock Size Guide: Find Your Perfect Fit
Birkenstock size guide: choosing size and width
Find out how to measure your feet, choose narrow or regular width and check the fit of your Birkenstock sandals.
Your foot should sit centrally in the contoured footbed, with a little room in front of the toes and behind the heel.
Before choosing a size
Some space is normal when trying the flat sandal while standing. Your foot moves and the sandal flexes as you walk. Too little room can leave your toes or heel on the rim.
The right size supports your whole foot within the footbed, without overhanging or excessive movement.
How Birkenstock sandals should fit
Correct fit
Leave room behind your heel too
Your heel should not sit against the back rim, which could become uncomfortable when walking.
Too small
A foot at the rim may need a larger size
Toes or heels too close to the rim leave insufficient space, even if the fit seems fine when standing.
Incorrect width
Check the width if your foot feels squeezed
If your foot presses against the sides, try regular width or reassess the size and width combination.
Too large
Excessive room may mean the size is too large
Allow some space, but not so much that your foot slides around. Consider a smaller size or a different width combination.
Straps
Straps should support without squeezing
Adjust the straps for secure support with a little room for movement. Tightening them cannot fix an incorrect size.
Straps
Avoid overtightening
Overtight straps restrict movement and can cause discomfort. Secure the foot without compressing the instep.
Quick fit checklist
- Toes should not touch or overhang the front.
- The heel should not rest against the back rim.
- Keep the foot centred within the footbed.
- Leave a little space, without an excessive gap.
- Straps should hold without squeezing.
- Check width or size and width together if the foot presses against the sides.
How to choose your size
- Measure foot length: mark the heel and longest toe on paper and measure the distance in millimetres.
- Also measure width: measure the widest part of your foot for comparison with the chart.
- Check the chart: find your length and compare narrow and regular widths.
- Check the actual fit: the chart is a guide; your foot should sit centrally, with room and without overhanging.
What narrow and regular width mean
Many Birkenstock models come in two widths: Narrow and Regular. Narrow can suit slim or standard feet, while regular offers more lateral space for wider feet.
More than one size and width combination may feel comfortable. A smaller size in regular width or a larger size in narrow width can sometimes work. Check support, lateral pressure and movement rather than relying on the label.
Between sizes or widths, check length, heel and toe space, and pressure at the sides.
Birkenstock size chart
Measurements below are in millimetres and provide a reference for choosing size and width.
| EU size | Width | Foot length | Foot width | ||
|---|---|---|---|---|---|
| From | To | From | To | ||
| 35 | Narrow | 221 | 225 | 81 | 84 |
| Regular | 221 | 225 | 85 | 89 | |
| 36 | Narrow | 226 | 230 | 83 | 86 |
| Regular | 226 | 230 | 87 | 91 | |
| 37 | Narrow | 231 | 240 | 84 | 89 |
| Regular | 231 | 240 | 90 | 98 | |
| 38 | Narrow | 241 | 245 | 86 | 91 |
| Regular | 241 | 245 | 92 | 100 | |
| 39 | Narrow | 246 | 250 | 88 | 93 |
| Regular | 246 | 250 | 94 | 102 | |
| 40 | Narrow | 251 | 260 | 90 | 95 |
| Regular | 251 | 260 | 96 | 104 | |
| 41 | Narrow | 261 | 265 | 91 | 96 |
| Regular | 261 | 265 | 97 | 105 | |
| 42 | Narrow | 266 | 270 | 93 | 97 |
| Regular | 266 | 270 | 98 | 107 | |
| 43 | Narrow | 271 | 280 | 95 | 100 |
| Regular | 271 | 280 | 101 | 109 | |
| 44 | Narrow | 281 | 285 | 97 | 102 |
| Regular | 281 | 285 | 103 | 111 | |
| 45 | Narrow | 286 | 290 | 99 | 104 |
| Regular | 286 | 290 | 105 | 113 | |
| 46 | Narrow | 291 | 300 | 101 | 106 |
| Regular | 291 | 300 | 107 | 115 | |
| 47 | Narrow | 301 | 305 | 103 | 108 |
| Regular | 301 | 305 | 109 | 117 | |
| 48 | Narrow | 306 | 310 | 105 | 110 |
| Regular | 306 | 310 | 111 | 119 | |
| 49 | Narrow | 311 | 320 | 107 | 112 |
| Regular | 311 | 320 | 113 | 121 | |
| 50 | Narrow | 321 | 325 | 109 | 114 |
| Regular | 321 | 325 | 115 | 123 | |
Birkenstock sizing FAQs
Do Birkenstocks run large or small?
They can feel different from closed shoes because the footbed needs space in front and behind. A correct fit may initially feel roomier.
What if I am between sizes?
Avoid a sandal that is too short. Check that toes and heels do not touch the rims and the foot is centred.
What is the difference between narrow and regular?
Narrow can suit slimmer or standard feet. Regular provides more room at the sides for wider feet or a foot that feels squeezed.
Can my size differ between widths?
Sometimes nearby combinations can both work: a smaller size in regular width may feel similar to a larger size in narrow width. Check length, width, space and support on your foot.
Should the straps be very tight?
No. They should secure without squeezing. Having to overtighten may indicate an unsuitable size or width.
Why does there seem to be spare space?
The foot should not reach the rims. It moves as you walk and the sandal flexes; a little space helps keep it within the footbed.
Shop Birkenstock at ECRU
ECRU is an official Birkenstock retailer. If you are comparing sizes, widths or models, use this guide and check that your foot sits centrally in the footbed.
Official Birkenstock size and width chart
Explore the Birkenstock collection at ECRU for available models and sizes.
After measuring your feet, you can check the Birkenstock Boston Oiled Leather Tobacco Brown product page and review the model’s options and details before choosing.