OP, we need the full size, not just the section width. We need the aspect ratio and wheel diameter to determine the total diameter of the tire.
In 2WD and open diffs you can run 4 different tire sizes, won't matter. If you have an auto locker you MUST run the same size tires on that axle. If you have a selectable locker you can again run 4 mismatched tires *AS LONG AS YOU DON'T TURN THE LOCKER ON*.
In 4wd one smaller/larger tire will work, as long as they are on open diffs.