When shopping for center-cut salmon, try to find a fillet that is of even thickness. That way you end up with evenly sized cubes of salmon.
We have left the skin on in our version of salmon bites simply because it helps prevent them from falling apart. You can remove it if desired or ask the grocer’s meat department to remove it for you.
If removing the skin from the salmon yourself, use a sharp chef’s knife held horizontally to carefully slice the skin away from the flesh.