Had a 4.7-5m white swim around our boat a few years back, just off the main swimming beach. I was in awe at the sheer width/girth of the shark...about 90cm wide across back, 3.5m wide span across fins.
I've seen a few since then, but that one was close enough for my wife to touch its fin...which she did & it freaked me out! When it attacked our prop I decided it was time to get out of there, so threw a handful of pillys in the water to distract it & took off.