Name: Ocun Diamond S Climbing Shoe
Rating: 5.00 (1 reviews)

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Designed for maximum performance, comfort, and precision

Jump To Mitch's Experience wearing Ocun shoes

Tips for sizing your foot correctly:

Please note when measuring, it is on a bare foot without any shoes or socks.

Using a tape measure for best accuracy, measure from heel to longest toe and compare to the MM section. Round up if in between sizes

This measurement gives your high performance size

No upsize = high performance for sending climbs
Half size up = performance but more comfy
Full size up = All day comfort

Choose the UK sizing when ordering

UK	EUR	MM
2	33	210
2.5	34	215
3	35	220
3.5	36	225
4	37	230
4.5	37.5	235
5	38	240
5.5	38.5	245
6	39	250
6.5	40	255
7	41	260
7.5	41.5	265
8	42	270
8.5	42.5	275
9	43	280
9.5	44	285
10	45	290
10.5	45.5	295
11	46	300
11.5	46.5	305
12	47	310
13	48	315
14	49	320
15	50	325

Sizing feedback from Mitch:

Foot Profile:

Measured foot size: 253mm - rounded up to 255mm (6.5UK).
Cube style toes
Average width.

Wearing a Bullit in 6.5UK:

My foot felt very snug.
Heel actively pushing toes into end
Toes are bent
This is a performance fit.

Wearing a Havoc in 6.5UK:

- Foot still feels snug but less pushing in the toes as the heel in less pre-engaged.
- Still feels somewhat of a performance fit.

Wearing a Fury in 6.5UK:

- - I struggle to get my foot in the shoe as it's a narrow model
  - Once I do, it's very tight.
  - Pain after 10mins in toes, particularly pinky toes.
  - For a narrow shoe, it's better to upsize half a size as I have a normal sized foot.

Wearing a Ozone in 6.5UK:

- Shoes are hard to get on, less difficult than Fury.
- Once on are more snug than the Bullits.
- Pain after 20mins in the pinky toes.
- This is a true performance fit.

Yes, I wear a lot of shoes... back to top?

Out of stock with us, but it's a popular restock item, usually available from our supplier.
We place supplier orders weekly, so it typically takes 3 to 5 days to arrive once yours is placed.
We'll keep you posted if anything changes.

Ocun's most recent powerhouse. The Diamond S has earned its place at the top of the Ocun range by doing something rare — performing at an elite level across every discipline while remaining a shoe you genuinely want to wear. Bouldering, sport climbing, trad, indoor or outdoor — it handles all of it without asking you to sacrifice comfort to get there. The kind of shoe that makes you forget you're wearing it, until it does something your last pair couldn't.

Who it's for Experienced climbers who want a premium all-disciplines shoe that is as comfortable as it is capable. Those who are tired of choosing between performance and wearability.

When to choose it over the Fury The Diamond S is Ocun's most recent flagship and brings updates across the board. For climbers who find other performance shoes a touch too aggressive, the Diamond S's glove-like fit makes it the more approachable premium option without compromising on output.

How it fits and feels Snug and glove-like — it wraps your foot closely without pinching. Comfortable from the outset, moulding to your foot shape over time. Feels secure and precise without being punishing.

Ocun's flagship The most recent and most capable shoe in the current lineup.
All-disciplines Performs at a high level on boulder problems, sport routes, trad, and comp climbing.
Glove-like comfort Snug without being painful — a shoe you can actually wear for the whole session.
Progressive performance Pushes your climbing without pushing your feet to breaking point.

Flat Rate shipping from $9.95, faster options available at checkout.

Get the sizing right, guaranteed.

If it doesn't fit? We'll cover shipping both ways for exchanges - no matter how many swaps it takes.

The catch: You need to reach out before buying.

Full details on our Shoe Sizing Guarantee →

Ocun produce equipment that provides the best climbing experience, always striving for improvement and innovation by bringing a precise engineering approach to function and safety of climbing gear design.

Over the years, Ocun has been behind some large innovations which people forget about, including:

The seamless heel first invented by Ocun, now used universally in all climbing shoes
Crack gloves we all know and love

$9.95 Flat Rate Shipping

Faster options available at checkout, read our Shipping Policy.

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Shop Location

Find information about our Toowoomba shop here.

Happy Biner acknowledges the Giabal and Jarowair people as the Traditional Custodians of Toowoomba, the lands on where we meet, work and climb.

We pay our respects to Giabel and Jarowair Elders past, present and emerging.

Ocun Diamond S Climbing Shoe

Tips for sizing your foot correctly:

Sizing feedback from Mitch:

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