Those sandals are very comfortable and materials seem pretty good. Apparently thats only for new purchases??). trial and error. As long as the posts properly insert into the earpads, there is zero gap. 5-6 . Some serious brain power went into attaching these to the car. Bought two pair of these three months ago and in the same week both only had sound out of one side. Nice slip resistant sole. Theres plenty of clearance on the drive side obviously, but then the stand gets in the way of any light mechanical work you may want to do. DO NOT expect the brim to just be uniformly flat the whole way around, this isnt how the hat works natively.