The box blade is seven foot and the rotary cutter is a six foot. I could have gone a little bigger with my tractor, but I already have a 10 foot 3-point and 10 foot six inch Woods pull behind for the bigger areas and I have a wheeled ten foot box blade, so I needed something a little more maneuverable.
Thankfully I have an "understanding" wife or my "need" for yet more equipment might not sound so reasonable
The back blade in the background is a 5 foot King Kutter for my SCUT/CUT awaiting transport back to another farm.