You've tried them on. But do they actually fit correctly?

This is the question more people should ask before they leave the store or accept their online delivery. A Birkenstock that fits properly feels noticeably different to one that's slightly off — and the difference between a good fit and a great fit often comes down to a few small adjustments that take less than a minute to make.

Here's exactly what to look for.

What Does a Well-Fitting Birkenstock Feel Like?

A correctly fitted Birkenstock should feel secure without feeling tight. Your foot should sit fully within the footbed — not hanging over the edges, not jammed against the front, not sliding backward. The arch support should sit under your arch, the heel cup should cradle your heel, and the toe bar (the slight ridge near the front of the footbed) should sit just below your toes, encouraging them to gently grip as you walk.

If all of that is happening, your feet are in the right place. If any of it isn't, something needs adjusting — and it's usually simpler than you'd think.

Your Birkenstock Fit Checklist

Work through each of these points with the shoes on and the straps properly adjusted.

Toe space — can you see 5mm of footbed in front of your longest toe? Your toes should not be touching or hanging over the front edge of the footbed. There should be a visible gap of at least 5mm between your longest toe and the front of the footbed. If your toes are at the edge or over it, go up a size.

Heel space — is there 5mm of footbed behind your heel? Look at the back of the shoe. Your heel should sit within the heel cup with at least 5mm of footbed visible behind it. If your heel is hanging off the back, go up a size.

Width — is your foot sitting fully within the footbed on all sides? Look down at your foot from above. Your foot should sit within the footbed without any part of it sitting on top of or over the edge. If your foot is spilling over on either side, you need a regular width rather than a narrow. If there's a lot of space on either side and the shoe feels sloppy even with straps tightened, a narrow width may be worth trying.

Arch — does the arch support feel like it's sitting under your arch? The cork footbed has a contoured arch that should sit directly under the natural arch of your foot. It may feel unfamiliar at first, especially if you're used to flat shoes — that's normal. What shouldn't happen is the arch support sitting too far forward or back, which is usually a sign the foot isn't in the right position on the footbed.

Straps — can you slide one finger comfortably under each strap? This is the one most people skip, and it makes the biggest difference. Adjust every strap so that your foot feels held in position without any pressure on the skin. You should be able to slide one finger under the strap — not two or three, but one. Too loose and your foot will slide forward and the shoe will feel like the wrong size. Too tight and the straps will dig in. Get this right and the whole shoe transforms.

Heel counter — does your heel feel cradled rather than gripped? The deep heel cup should wrap around your heel and hold it gently in place. It shouldn't feel like it's gripping or squeezing. If there's pressure on the sides of your heel, check whether a narrow width might be a better fit — or whether the strap tension needs adjusting.

Overall stability — does your foot feel planted when you take a few steps? Walk a few steps with the shoes on. Your foot should feel stable and connected to the footbed. If it's sliding around, tighten the straps. If it feels like you're perching on the shoe rather than in it, the size or width may need revisiting.

What If Something Feels Off?

Start with the straps before you do anything else. The vast majority of fit issues — shoes feeling too big, foot sliding forward, general instability — are solved by tightening the straps to the correct tension. It's the most common fix and the quickest one.

If the straps are right and something still feels off, check the 5mm rules at the front and back. If either of those aren't met, a size change is the answer.

If the footbed width feels wrong in either direction, try the other width option. And remember — around 80 to 90% of Australians fit a regular width. If you're unsure, regular is always the right starting point.

Want Help Getting It Right?

Every member of our Bstore team is fully trained in Birkenstock fitting. Bring your new pair in, or try a few styles in store, and we'll work through this checklist with you to make sure everything is sitting exactly as it should.

A correctly fitted Birkenstock is one of the most comfortable things you can put on your feet. Getting there takes about five minutes — and it's absolutely worth it.

For more detail on sizing before you buy, our first-time buyer's sizing guide covers everything from how to measure your foot to the regular vs narrow decision in full.

Shop the full Birkenstock range at Bstore, with free shipping on orders over $160 Australia-wide.

Frequently Asked Questions: How Should a Birkenstock Fit?

Why do my Birkenstocks feel too big even though I ordered my correct size? Almost always the straps are too loose. Tighten them so your foot stays in position on the footbed — you should be able to slide one finger under each strap but not two or three. Once the straps are correctly adjusted the shoe will feel completely different.

How much space should be at the front of Birkenstocks? At least 5mm between your longest toe and the front edge of the footbed. Your toes should never be touching or hanging over the front. If they are, go up a size.

Should Birkenstocks feel tight when you first put them on? No. They should feel secure but never tight. If the straps are creating pressure on your skin, loosen them slightly. Initial unfamiliarity with the arch support is normal and will ease during the break-in period — but pressure or tightness from the straps is always a fit issue worth correcting immediately.

How do I know if I need a regular or narrow width Birkenstock? With the straps undone, place your foot flat on the footbed and look at where it sits relative to the edges. If any part of your foot sits on top of or over the edge of the footbed, you need a regular width. Around 80 to 90% of Australians fit regular — it's the right starting point for most people.

Can I get help checking my Birkenstock fit at Bstore? Absolutely. Every member of our in-store team is fully trained in Birkenstock fitting and can work through the checklist with you in just a few minutes. Come in to any of our locations and we'll make sure everything is sitting exactly as it should before you leave.

Birkenstock Fit Checklist: Quick Reference

Use this as a fast reminder when trying on any Birkenstock style.

What to check	What good looks like
Toe space	5mm of footbed visible in front of longest toe
Heel space	5mm of footbed visible behind heel
Width	Foot sitting fully within footbed on all sides
Arch	Arch support sitting directly under your natural arch
Straps	One finger slides under each strap comfortably
Heel cup	Heel feels cradled, not gripped or squeezed
Stability	Foot feels planted and stable when walking