I'm a six-foot tall guy and would say I'm slightly above average in size. I've got a big mouth too (just ask my wife). You'd think that the Radius Scuba brush would be a perfect fit for me. When it comes to fitting in my hand the yes, it's perfect. The design of the handle maximizes grip and precision like no other toothbrush out there. It comes in either right or left hand styles to insure you get the best possible control over the brush action. The bottom portion of the handle … more