Boreal Joker Large are for those individuals with slightly larger feet than others, due to the increased amounts of materials used and the new templates required to make them they are unfortunately slightly more expensive than the standard Joker. This does however mean you get a purposefully made shoe which lacks nothing in comparison with the standard Joker. Boreal Joker rock shoes are the new Ace! If you can remember that far back of course! The Joker has been around for a long time now and there is a very good reason for that, these rock climbing shoes are super comfy and our most popular intermediate shoe choice. A good slightly-more-asymetric-than-an-ace shape and excellent build quality make this an instant 'player' in the comfy all rounder sector. The new rubber sticks like poop to a blanket.
Fit same size to half down.

For information on rock shoe fit and what's right for you check out Rob's guide here:

Rock Climbing Shoes Overview