I was going back and forth between the Levys 3" and 4" wide (agree completely on the padding and the suede - really helps). I went with 3" because for how I wear the bass I'm thinking 4" might be too wide and push against my neck. I suppose that begs the question - how wide is too wide?
But I also make sure all my basses are under 9lbs so that helps as well.
But I also make sure all my basses are under 9lbs so that helps as well.