The longest bow recovered from the 'Mary Rose' Tudor warship was 83.18 inches or 2113 mm long.
So yes, that is a touch over 6ft 11in long.
This bow was 39mm wide and 36mm thick in the center of the bow and had a squarish profile.
It was fine grained, so based on this info it was probably one of the heavy ones, 140 - 180 lbs draw weight!