How do Birkenstock EU sizes convert to US?

As a guide, EU 38 is about a US Women's 7 to 7.5, EU 40 is about a US Women's 9 or US Men's 7, and EU 42 is about a US Men's 9. Birkenstock prints both EU and approximate US sizing on the footbed.

Should I get the original or soft footbed?

The original firm cork-latex footbed gives the iconic deep heel cup and arch support. The soft footbed adds a foam layer over the cork for an easier first wear, especially with plantar fasciitis, though the arch support feels less pronounced.

Feet Heart

Birkenstock Arizona Sizing Guide

Q: Does the Birkenstock Arizona run big or small?

The Arizona runs slightly large. Most customers wear their true Birkenstock EU size, but if you are between sizes or have a narrow foot, size down or choose the narrow width.

Q: How do I choose Regular vs Narrow width?

Regular is the default. Choose narrow if your toes do not reach the edges of the footbed in your normal size, or if your foot looks lost in the toe straps. Roughly a quarter to a third of customers do better in narrow.

Q: How long is the Arizona break-in?

Wear them about two hours a day for the first week, building up. The cork footbed gradually molds to your arches and heel, and full break-in is about three to four weeks.

The Arizona is the two-strap original — the sandal that started it all. Sizing it correctly is the difference between a footbed that molds to your arch over a few weeks and one that hurts. Here's how we fit them in store.

Ready to shop? Browse every Birkenstock Arizona in stock — all colors, materials, and widths in one place.

Does the Birkenstock Arizona run big or small?

The Arizona runs slightly large. Most customers wear their true Birkenstock EU size, but if you're between sizes or have a narrow foot, size down or choose the narrow width.

How do EU sizes convert to US?

EU 38 ≈ US Women's 7 to 7.5
EU 39 ≈ US Women's 8 to 8.5
EU 40 ≈ US Women's 9 / US Men's 7
EU 41 ≈ US Women's 10 / US Men's 8
EU 42 ≈ US Men's 9
EU 43 ≈ US Men's 10

Always check the sole stamp — Birkenstock prints both EU and approximate US sizing on the footbed.

Regular vs narrow width — how do I tell?

Regular is the default. Choose narrow if your toes don't reach the edges of the footbed in your normal size, or if your foot looks lost in the toe straps. Narrow lasts are clearly marked on the box and the sole. Roughly 25–30% of customers do better in narrow.

Original footbed vs soft footbed — which should I get?

The original (firm) cork-latex footbed gives the iconic deep heel cup and arch support. The soft footbed adds a foam layer over the cork — easier first wear, especially if you have plantar fasciitis or are coming from cushioned sneakers, but the arch support feels less pronounced.

How long is the break-in?

Wear them two hours a day for the first week, building up. The cork footbed gradually molds to your arches and heel. Full break-in is 3–4 weeks. If after a month it still pinches in one spot, bring them back — that's the size or width.

Shop the Arizona

Arizona Birko-Flor — the classic two-strap.
Arizona Soft Footbed — adds a foam cushion layer over the cork.
Arizona Washed — a washed-metallic leather finish.

Free returns if I get it wrong?

Yes — free U.S. shipping and free 30-day prepaid returns on regular-priced Birkenstocks. Sale items final.

Need fit help?

Call (310) 398-7497 or email info@feetheart.com. Shop Birkenstock at Feet Heart · Full Birkenstock EU-to-US sizing guide · Birkenstock Boston sizing guide.

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