According to Bushwacker, these flares add 1.50" of wheel coverage. As far as looks, that's such a matter of taste, that we can't really give you a suggestion. Secondly, if your goal is to align your tires with the flares, then spacers are only one part of the equation and you'll need to consider how wide of a tire you want to run. We ran a 1.50" Spacer and 285/70R17 tires on our 2019 Ranger Build, but we had to trim the crash bars to run that combo. Your best bet would be to call us directly at 623-434-5277 so we can get more specific about what you're trying to do.