Which Birkenstock Arizona Should You Buy? Birko-Flor, EVA, Leather and Big Buckle Explained
The question we hear most often about Birkenstocks isn't "do you have them?" It's "why is that pair £50 and that pair £115 when they look the same?"
It's a fair question. The Arizona, Birkenstock's two-strap classic, comes in more materials and versions than any other sandal we stock, and the names on the box (Birko-Flor, BS, EVA, Big Buckle) don't explain themselves. And once that question is answered, a second one follows almost every time: what's the difference between narrow and regular? That one matters even more than the material, because the wrong width is the main reason a pair of Birkenstocks ends up at the back of the wardrobe. This guide answers both.
The short answer
Every classic Arizona shares the same famous contoured cork-latex footbed, the thing that actually makes a Birkenstock a Birkenstock. What changes between versions is the upper material, the buckles, and in one case the entire construction. In plain terms: Birko-Flor is the durable, easy-care synthetic and the best-value way in; EVA is the lightweight waterproof foam version for the beach and garden; leather costs more, breaks in beautifully and lasts longest; and Big Buckle is the dressed-up fashion version with oversized hardware. The rest of this article is the detail, plus the width and sizing advice the box won't tell you.
Birko-Flor: the everyday classic (from around £80)
Birko-Flor is Birkenstock's own synthetic upper: a tough, leather-look material backed with a soft brushed fleece where it touches your skin. It's the material most people's first pair is made from, and for good reason. It holds its shape and colour for years, it wipes clean with a damp cloth, it doesn't mind the odd rain shower, and it's vegan-friendly. There's no breaking-in to speak of, because the fleece lining is comfortable from the first wear.
If you're buying your first pair, or replacing a pair you live in all summer, this is where we'd point you. The Arizona in New Beige is the one we sell most of in this material, a soft neutral that goes with everything. For men, the Arizona BS in Black is the dependable workhorse of the range. (The "BS" on the box simply means Birko-Flor with the soft fleece lining; it's not a different sandal.)
You'll also see Birko-Flor in patent and metallic finishes at a similar price. Same material, same care, just a glossier face.
EVA: the waterproof one (from around £50)
The Arizona EVA looks like the classic from a distance but is a completely different sandal in the hand: a single piece of ultra-light waterproof foam, footbed and all, weighing next to nothing. You can rinse it under the tap, leave it by the pool, sandy it up on holiday and hose it off when you get home.
What it isn't is a replacement for the original. The moulded foam copies the shape of the cork footbed but not its firmness. It's softer and more flexible, and it won't gradually mould to your foot the way cork does. Our honest advice is that the EVA is the second pair: the classic for every day, the EVA in White for the beach, the garden, the caravan and the gym bag. At this price, plenty of customers buy both. We carry kids' EVA styles too. At around £25 they're the ideal summer-holiday shoe for children, for exactly the same hose-it-off reasons.
Leather: the pair that gets better with age (from around £95)
Step up to leather and you're paying for character. The oiled-leather Arizona, like the Habana, starts matte and slightly stiff, then softens and deepens in colour with wear until, a couple of summers in, it looks better than the day you bought it. Suede versions are softer from day one with a more casual look.
Two honest caveats. First, leather needs a short breaking-in period, so wear it an hour or two a day for the first week rather than marching it round a city break straight out of the box. Second, leather wants a little care: keep it away from soakings, and treat oiled leather occasionally to keep it supple. In exchange you get the longest-lasting Arizona there is.
Big Buckle: the fashion statement (from around £115)
The Arizona Big Buckle takes the classic and swaps the modest buckles for oversized polished hardware on a smooth leather upper, usually with a leather-wrapped footbed edge. Underneath it's the same sandal; on top it's a different proposition entirely. This is the version that gets worn with dresses and tailoring rather than shorts. The Big Buckle in Soft Pink is the standout in the current range.
Worth knowing: Big Buckle styles generally come in the narrow fit, which suits most women. More on widths below, because this is the bit that matters most.
The fit advice the box doesn't tell you
Whatever material you choose, two things decide whether you'll love your Birkenstocks.
Narrow vs regular isn't what it sounds like
Birkenstock makes every style in two widths, and the names mislead people constantly. "Regular" is genuinely wide. It suits broad feet and most men. "Narrow" is really a standard width and suits most women and anyone with a slim or average foot. Check the stamp on the footbed: a filled-in foot symbol means narrow, an outlined foot symbol means regular. If you're between the two, narrow with the straps let out almost always beats regular with the straps cinched tight, because a strap pulled to its last hole never sits flat.
Sizing is EU, and your toes need room
Birkenstock sizes in EU only. A UK 5 is roughly an EU 38 and a UK 8 roughly an EU 42, but the real test is standing in them: you want about 5mm of footbed visible in front of your toes and behind your heel, and the straps snug but not gripping. Your foot should never touch the raised front edge of the footbed. If you're between sizes, most people find sizing up more comfortable than sizing down, and the adjustable straps take up the slack.
Two cousins worth knowing about
If you love the Arizona but need something slightly different, two styles in our Birkenstock range are really Arizonas in disguise. The Milano is the Arizona with a heel strap added, the choice for anyone on their feet all day, for driving, or for anyone who finds slides slip at the heel. And the Boston is the closed-toe clog on the same footbed, which has quietly become the most asked-for style in the range. It extends Birkenstock comfort into spring and autumn.
So which one should you buy?
If it's your first pair: Birko-Flor, in the width that matches your foot, sized standing up. If you're heading on holiday or live in your garden: add the EVA. If you've worn Birkenstocks for years and want a pair to grow old with: oiled leather. And if you want the version that turns heads: Big Buckle.
You can browse the full range online; the women's Birkenstock collection has the widest choice. We're a family business and we'd genuinely rather you bought the right pair than the expensive pair. If you've got a question we haven't answered here, get in touch and the team will help.
Frequently asked questions
What's the difference between Birko-Flor and leather?
Birko-Flor is a hard-wearing synthetic with a soft fleece lining: easy-care, colour-fast and the most affordable route in. Leather costs more, needs a short break-in, and develops character with age. The footbed is identical on both.
Is the EVA as comfortable as the original?
It's softer and lighter, but it doesn't mould to your foot the way the cork footbed does. EVA is the beach and garden pair; the classic is the everyday pair.
Should I buy narrow or regular?
Narrow suits most women and average-width feet; regular is genuinely wide and suits broader feet and most men. Look for the foot symbol on the footbed: filled means narrow, outlined means regular.
Do Birkenstocks stretch?
The cork footbed moulds to your foot over the first few weeks, leather uppers soften noticeably, Birko-Flor softens slightly, and EVA stays as it is. Build up wear gradually with a new pair.
Are they waterproof?
Only the EVA. Keep the cork-footbed versions out of soakings and dry them naturally if they get caught in the rain.
What size should I order?
Birkenstock uses EU sizing, roughly UK 5 = EU 38 and UK 8 = EU 42, but standing room matters more than the number: around 5mm of free footbed in front of your toes. Between sizes, go up rather than down.
Donaghys has been selling shoes in Banbridge for over 65 years. Every Birkenstock we sell online ships with free standard delivery over £79.99 and free returns over £79.99, so if the width isn't right, swapping it is easy.
