Black Diamond Hiking/Climbing Boots/Shoes/Footwear Size Chart/Guide/Advice

Mondo Sizes
Black Diamond footwear uses the Mondo sizing system, where each whole size is equivalent to exactly 1cm in length.  To ensure the best fit we recommend:

    ●   If you have owned Black Diamond before, buy the same size again, their sizing has not changed.

    ●  Shop using Mondo, UK or US sizes.

    ●  Follow our "How to Measure Your Mondo Size" advice and video lower down this page.  

UK and US Sizes
Black diamond UK and US sizes run true to size for a perfect fit right out of the box.  No need to go up or down a size.

EU Sizes
Black Diamond EU sizes are correct or very close to being correct for almost all sizes.   The correct EU size conversions from Mondo are shown in the "Absolute" column.  We are convinced the "EU Absolute" column is correct because it is used by most other brands and because the sequence of sizes follows a consistent pattern. EU shoe sizes increase in 3.333mm increments - which is why, when presented to a single decimal point, they should always end with .0, .3 or .7 and never with .5.  

On Our Website.....
On our website we use Black Diamond sizes (even though they are not always correct) because these are what appear on the shoe boxes and the shoes themselves.

Black Diamond Shoe/Boot Sizes - International Comparisons

MondoUKUS Men'sUS Wmn'sEUEU
28.59.510.5 4444
29.01011 44.544.7
29.510.511.5 4545.3
30.01112 4646
30.511.512.5 46.546.7
31.01213 4747.3
31.512.513.5 4848
32.01314 48.548.7
32.513.514.5 4949.3
33.01415 49.550

Source:  Black Diamond / Absolute

Absolute Confidence

We are experts on shoe sizing and are confident in the information we have provided because we:

Tick  Have been selling shoes in our Sports Shop for years.

Tick  Carefully research sizes for every brand we sell.

Tick  Are very proud of our extremely low returns rate.

Tick  Have been selling footwear online since 2004.


Still not sure what size to get?

Buy a few pairs to try at home. We offer:

Tick  FREE Delivery on most orders to most destinations.

Tick  Low Cost Returns within the UK.

Additional Help & Advice

Tick  Browse our Advice Centre for more buying guides.

Tick  Email any time.

Tick  Phone during normal Shop Hours

Tick  Visit our Mountain Sports ShopAddress