The physical size of a filter doesn't matter (as long as it will fit in the space allowed). The main specs to look at are filtering efficiency (the fewer microns, the better), filtering capacity (how much dirt can it hold and still flow through), and bypass pressure.
The more oil you have in the system, the better. A bigger filter is (usually) better. Just remember that you need to add a little extra oil.
I usually run the biggest filter that will fit - and meets or exceeds the specs pointed out above - and have had no problems over the 30-40 years that I have done so. Edit: Can't do that with the Challenger; it has a top-mount cartridge.
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